Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Engine Ground Location?
View Single Post
Old 11-06-2012, 10:47 AM   #5
Focus Fanatic
Magus2727's Avatar
Join Date: Feb 2009
Fan#: 62897
Location: Salt Lake City, UT
What I Drive: 2001 MB ZX3, 2004 SY SVT ZX5

Posts: 8,240
Points 14,490, Level 78
Points: 14,490, Level: 78 Points: 14,490, Level: 78 Points: 14,490, Level: 78
Level Up 10% Completed
Level up: 10% Level up: 10% Level up: 10%
Forum Activity 99%
Activity: 99% Activity: 99% Activity: 99%
FF Reputation: 21 Magus2727 Great Standing Member
Buy-Sell-Trade Rating: (2)
It should be about the same size as the power going to the starter or a gauge smaller. It is a shorter run for the ground than the positive and since it is only cranking a few seconds it can handle the current for that length of time. That is one of the "big 3" that most people do upgrade though. 4 AWG should be plenty large enough.

While this is the main engine ground there are a few other less direct paths to ground (O2 sensors should have their own ground wire, the motor is mounted to the transmission which has the half shafts to the chassis, etc).
2001 ZX3 Zetec - Rebuild "The TICK" (
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
2004 ZX5 SVT - Restoration "Code Name Rocket" (
Magus2727 is online now  
    Reply With Quote