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Thread: Help me make a How To on Making Your Own Wiring Harness For Cruise Control (smart people with wiring diagrams apply within) Reply to Thread
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Topic Review (Newest First)
08-21-2013 08:21 PM
FocusKnot For those like me that bought the factory kit only to find out that your cruise control light does not function after it is installed, I would like to share what I did about it. I just couldn’t accept my light not working. In fact, I consider the light not functioning to be a safety issue…but maybe that’s just me. Here’s how I did it:

1. Disconnect the battery.
2. Unhook the speed control cable from the throttle body (this makes it easier to get the cable off the servo). Leave the cable housing attached to the bracket.
3. Remove the speed control actuator cable from the servo by pressing in on the lock and rotating counterclockwise about 1/8 turn. Pressing the spring holding the cable onto the actuator pulley will help to get the cable completely off.
4. Disconnect the servo wire harness.
5. Remove the servo from the firewall.
6. Drill a 1/8” hole in the back of the servo harness connector at the pin 1 position. You will feel the drill go through the black plastic and then through the inner white plastic.
7. Pry outwards on the red locking bar on the servo connector with a small screwdriver and remove.
8. Trim off the tab on the red bar and also the black tab in the pin 1 position (an X-Acto knife works well for this). This makes room for the wire in the next step. Insert the red bar back into the connector.
9. Run the end of a wire (18 to 22 gauge should work fine) about 7 ft. long through the back of the servo connector pin 1 position. Pull enough wire through the connector to do the next step.
10. Solder the wire to pin 1 on the servo on the side next to the connector latch. You can bend the tab down slightly to make this easier, but straighten it back up after soldering. Don’t wrap the wire around the tab because there is not enough room.
11. Reinstall the servo on the firewall.
12. Reattach the servo wire harness to the servo. Pull the wire attached to pin 1 of the servo out the back of the connector while doing this.
13. Feed the new wire down the harness going through the firewall and into the interior.
14. Apply sealant (i.e. silicone) to the back of the servo connector around the new wire.
15. Reattach both ends of the servo speed control cable.
16. Remove the instrument cluster.
17. Solder the new wire to pin 4 on the instrument cluster connector as shown at the first of this thread (I attached mine on the backside of the board on the trace next to the bulb instead of on the connector, but either will work). Tie-wrap the wire to the instrument cluster and leave enough slack in the wire to allow for servicing the cluster.
18. Reinstall the instrument cluster.
19. Reconnect the battery.
20. Enjoy the light!
01-10-2013 04:50 PM
Lscman
Quote:
Originally Posted by blackzx4 View Post
wondering if you guys could tell me if my cruise control buttons/switches gets power or is routed trough the factory stereo? I installed a aftermarket deck and lost cruise if i put the factory deck back in and get cruise back this has led me to believe that my cruise must be getting power from my factory deck if so is it possible to just cut that wire and power the cruise from another source any help would be great.
sounds more like you wired the stereo wrong because the power sources are totally separate. A $3 voltmeter can confirm power to the cruise system. The original radio has a vehicle speed input to provide dynamic volume and you probably wired the stereo wrong causing it to short. This will kill the cruise because this same circuit is used for cruise. Maybe get a wiring diagram on ebay for $10 and you will see every wire the two circuits have in common
12-30-2012 02:07 PM
blackzx4 wondering if you guys could tell me if my cruise control buttons/switches gets power or is routed trough the factory stereo? I installed a aftermarket deck and lost cruise if i put the factory deck back in and get cruise back this has led me to believe that my cruise must be getting power from my factory deck if so is it possible to just cut that wire and power the cruise from another source any help would be great.
12-29-2012 11:41 AM
Lscman I would like to note an error in prior documentation that needs corrected for later year applications.

A running change was made in the clock spring that affects pin outs. I don't have enough wiring diagrams to determine the year that this change was made. It may be prior to 2005, I don't know. In any event, my 2007 clock spring uses pin 3 to feed battery positive power to the steering wheel cruise control switches. It is not pin 6 in a 2007 Focus, as might be assumed from reading the posted wiring diagrams and tables. The color of the pin 3 wire is still green with yellow stripe, so folks splicing wires based upon color and ignoring pin#'s should have no issues. Of course, a green-yellow color is also used on both sides of the brake switch and this doesn't help much lol.
12-28-2012 10:43 PM
Lscman After performing this conversion on an 07, not much to add. On ALL Duratec cars '07 and older, I believe the servo mounts in front of the battery behind the drivers headlight. Info is a bit sketchy on 05 and older duratec pzev's, but I believe they are much like 07's. The Duratec throttle body and intake is mounted in front of the engine instead of behind it. The mechanical cable loops downward under the intake and takes a 180 loop back toward the throttle body mounting point.

The servo and cable is unique to duratec cars. The hardware & wiring inside the car is very similar for 00 thru 07. Later duratec cars seem to have a clockspring that's cruise ready. This was always true in 2007. You can buy a '05 to '07 steering wheel with cruise switches on ebay. I paid $50 for a leather ST wheel and it fit nice on my strippo 07 S car. The wiring harness is fairly simple, about 12 wires. My '07 already had the green interlock switch on the pedal assy.
02-25-2012 09:53 PM
Lscman OK, the '06 to '07 cruise servo/module is mounted on an existing black painted steel bracket found on all cars which extends between the front of the battery rack to the left fender. It has threaded bosses on it to mount the servo module. I guess the bracket is discontinued because everyone already has a one on their car. There are two different servos for '06-'07 cars, one is for 2.3L and another for 2.0L. I imagine it is calibrated differently since the motors and throttle bodies are quite different.

The green connector on my '07 car (without cruise) is taped to the harness about 2" away from where it would connect to a cruise control brake position sensor. It's easy to spot.
02-24-2012 07:13 PM
Lscman
Quote:
Originally Posted by jay-rod05 View Post
No idea why they moved the servo, probably because the engine was different and the throttle body is in a different location?

I don't think anything has changed on the clock spring from 05 and above but it looked similar and the plugs were the same.

I did notice that on an 04 that did not have cruise, it did have the clock spring for the cruise wires and the connector had the white, brown, and green/yellow wires on it, so maybe after 04 they decided to just have one clock spring instead of two?



Brown, white, greenyellow from the clock spring are your cruise switch wires.

The hole above the black switch is the where the green brake pedal position switch goes. You said that the green switch was there, where is it tied away at?



Not sure what you mean by the servo module and the cruise servo being built into each other, from what I've found the servo module in the engine bay does everything, the rest is just wires and switches.

The ECU/PCM does not need to be programmed to use cruise. Only 08 and above need to be programmed since they are drive-by-wire systems. The only thing the PCM is used for with cruise on the 00-07 is Pin # 28 which is the Vehicle Speed Sensor, but I've come to find that you don't even need to run a wire all the way over to that side of the car, all you need to do is tap into the Green/White wire from the radio, which is the same signal.
Thanks! I didn't realize the servo module on 00-04 contained the electronics, but I noticed the long connector on one last night. I was thinking it had a separate module and servo like some older cars.

I'm not understanding what all the '06-'07 Focus cruise ecms are selling on ebay because they never show a pic. Are those servo modules? I read threads here claiming the pcm needs programmed to enable cruise but maybe that's for '09 and up fly by wire. Some go so far as claiming you need ot visit the dealer for a reflash and provide them a VIN# of a car with cruise.

I need to understand where the servo is mounted on '06 and '07 car. I see the battery box bracket has some space between the fender and battery with three bosses on it to accept bolts. However some service manal pics suggest the bracket is on the engine. There is also a little aluminum platform mount over top of the tranny bell just behind the cylinder head that would seem to fit a servo.
02-24-2012 03:48 PM
jay-rod05 Here's the wiring guide and parts list I made:

http://www.scribd.com/doc/82726802
02-24-2012 03:25 PM
jay-rod05
Quote:
Originally Posted by Lscman View Post
Awesome. I just purchased a 2007 zx3 manual strippo Focus last week for my daughter and bought the used ST leather wheel yesterday. It'll be a while before I dig into a junkyard to get the remaining cruise parts I need. Hopefully I can find somebody willing to let me hack an '07 car or I'll just adapt an earlier setup like you used. My 2.0 zetec motor was used all years I think & hopefully the throttle body linkage remained sinilar. I guess you're saying the '05-'07 steering wheel switches and clock spring are identical to the '02-'04 stuff. Any idea why they moved the servo toward the front of the engine bay in '05?

Your videos on youtube are wonderful. However it took me some time to realize all the harness hacking you did under the dash around the fusebox was simply to obtain some scrap multicolor wire to "reuse". I guess that's the difference between a thrifty student and an old engineer with spare cash and a cellar full of scrap wire.

Looks like it took a whole decade to get a comprehensive cruise install procedure posted on the internet for '00 to '07 focus...thanks so much for that!

PS: Ford parts websites show a unique clockspring for 2005 thru 2007. I'm not clear if air bag, turn signals, cruise, horn or something else changed.
No idea why they moved the servo, probably because the engine was different and the throttle body is in a different location?

I don't think anything has changed on the clock spring from 05 and above but it looked similar and the plugs were the same.

I did notice that on an 04 that did not have cruise, it did have the clock spring for the cruise wires and the connector had the white, brown, and green/yellow wires on it, so maybe after 04 they decided to just have one clock spring instead of two?

Quote:
Originally Posted by Lscman View Post
OK, some more info....

I own a 2007 Focus S strippo car with manual tranny. Keep in mind that cruise was not even an option on an S car.

Today I installed a tach cluster and made the following discoveries:

1) My car appears to have some or all OEM cruise wiring harness installed already, so the rumor that these cars are somewhat "ready" must be true.

2) the green connector to the pedal assy with 2 green wires with white tracer is folded back and taped near the pedal bracket.

3) clockspring appears to be wired on the 9 pin bottom connector. I was unable to see the pin #'s, but here the colors from left to right:

white w green tracer
blue w green tracer
green w yellow tracer
brown
white
black w blue tracer
black
black w orange tracer
green w red tracer

Also, as I viewed some ford internet parts sites I noticed that the clock spring got more expensive for models around 2006 and newer. I'm not sure why, but it appears to differ from the 2004 and earlier version. I haven't researched part numbers.

The bracket on my 2007 manual tranny pedal assembly has two switches on it. A big blue one on the left with 5 pin red connector and a black switch on the right side of the bracket (closer to brake) with black 3 pin connector. A spare hole sits above the black gadget for mounting another switch....maybe the green connector would plug into it.

hope this helps some. rick
Brown, white, greenyellow from the clock spring are your cruise switch wires.

The hole above the black switch is the where the green brake pedal position switch goes. You said that the green switch was there, where is it tied away at?

Quote:
Originally Posted by Lscman View Post
The details about 2005 cars are muddy in my mind. It appears to be carryover from '04 design.

However with respect to 2006 thru 2007 vintage cars, it appears they are all wired for cruise (ready). There does not appear to be a clockspring part# without cruise for this vintage, so it's equipped with one. The car also came equipped with clutch switch.

The servo module is built into the cruise servo beginning in 2006, so there's not stand-alone cruise control module. For this reason, the wiring to the servo is similar if not identical to the wiring to the pre-'05 module. From what I can see, the only things missing on my car are:

1) speed control servo (has integral module with 10 pin electrical plug)
2) cruise switches for steering wheel (or complete cruise steering wheel)
3) brake pedal position switch

I am confused whether the ECM/PCM needs programmed for cruise. I don't see why this would be necessary since the speed sensing is a standard feature and the cruise module intelligence is contained in the servo assy. But I really don't know.
Not sure what you mean by the servo module and the cruise servo being built into each other, from what I've found the servo module in the engine bay does everything, the rest is just wires and switches.

The ECU/PCM does not need to be programmed to use cruise. Only 08 and above need to be programmed since they are drive-by-wire systems. The only thing the PCM is used for with cruise on the 00-07 is Pin # 28 which is the Vehicle Speed Sensor, but I've come to find that you don't even need to run a wire all the way over to that side of the car, all you need to do is tap into the Green/White wire from the radio, which is the same signal.
02-23-2012 05:27 PM
Lscman The details about 2005 cars are muddy in my mind. It appears to be carryover from '04 design.

However with respect to 2006 thru 2007 vintage cars, it appears they are all wired for cruise (ready). There does not appear to be a clockspring part# without cruise for this vintage, so it's equipped with one. The car also came equipped with clutch switch.

The servo module is built into the cruise servo beginning in 2006, so there's not stand-alone cruise control module. For this reason, the wiring to the servo is similar if not identical to the wiring to the pre-'05 module. From what I can see, the only things missing on my car are:

1) speed control servo (has integral module with 10 pin electrical plug)
2) cruise switches for steering wheel (or complete cruise steering wheel)
3) brake pedal position switch

I am confused whether the ECM/PCM needs programmed for cruise. I don't see why this would be necessary since the speed sensing is a standard feature and the cruise module intelligence is contained in the servo assy. But I really don't know.
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