Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Help me make a How To on Making Your Own Wiring Harness For Cruise Control (smart people with wiring diagrams apply within)
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Old 02-24-2012, 02:25 PM   #17
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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?

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
black w blue tracer
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?

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.
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