Electrical Issue-SOLVED

[ttyoye]

Purchased a tt car with a glide 2 weeks ago. Car was fine when i went to test drive it we drove it good amount and didnt suspect anything out of the ordinary. Finally when we got home after our 13 hour trip the car did not want to start. Every single possible light came on the dash (advancetrac, oil, coolant, battery, hillstart not avail), fuel pump was working and had fuel pressure so we thought we had maybe left something on in the car so tried jump starting it. Let it sit on the cables for a few mins then the car just cranked and cranked so we just ended up pushing it in the driveway. While this was all happening, when the drivers door was open the chime would not stop until the drivers door was closed which we found odd too. Next morning i go to start the car and same thing crank and crank till it eventually wouldnt crank at all and lost fuel pressure and the fuel pump relay it ticking so i go the dealer and get a new battery and new relays for the starter and fuel pump. I plug them in then jump the car on jumpers and fuel pressure came back on and the only light on now was the steering assist fault along with the battery light still on. We checked all the gounds we could without the car being on the lift and did not see anything loose. Our only last thought was maybe the pcm bricked so i got the lund tune the previous owner had on the car and tried to reflash it. Now when we were flashing it through rtd flasher the car kept losing communication and had to restart the flash about 10 times till it wrote the tune over and yes we had a power supply connected to the battery while flashing. Im still thinking theres a loose ground somehwere that couldve happned during the trip back but who knows, we're going to put the car on the lift this weekend and look more into it. Would like to know your guys's oponions if anyone has ran into similar issues!

EDIT: forgot to mention before the first step which was to change the battery these 3 codes have gone away p0600 p0607 u0109

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[Cobra Jet]

Check to make sure the brake pedal pad has not fallen off:
https://www.mustang6g.com/forums/threads/brake-light-switch-near-pedal-failure.122100/

Also check the rear thrust washers, those trip the various codes too for advance trafl etc:
https://www.mustang6g.com/forums/threads/abs-advancetrac-power-steering.162475/#post-3308430

 

[ttyoye]

Check to make sure the brake pedal pad has not fallen off:
https://www.mustang6g.com/forums/threads/brake-light-switch-near-pedal-failure.122100/

Also check the rear thrust washers, those trip the various codes too for advance trafl etc:
https://www.mustang6g.com/forums/threads/abs-advancetrac-power-steering.162475/#post-3308430

All those lights have since gone away except steering fault and battery light is still on. Today i tried jumping the starter, the car cranks and fuel pressure is back along with pump activating but still does not start. Next step is to put new battery terminals on with a fresh cut, positive side is not the prettiest. Crossing my fingers.

 

[Buldawg76]

Does the car have a catch can installed on the passenger side next to battery housing? If so, the tab it is likely mounted on has a ground wire that also mounts there, so you need to make sure the ground wire is mounted on top of the bracket for the catch can between the screw and the mounting bracket not between the mounting bracket and the body mounting tab.

If that ground wire does not have good ground, it will set steering codes, not sure about no start issue but it's possible as well.

BD

 

[ttyoye]

Does the car have a catch can installed on the passenger side next to battery housing? If so, the tab it is likely mounted on has a ground wire that also mounts there, so you need to make sure the ground wire is mounted on top of the bracket for the catch can between the screw and the mounting bracket not between the mounting bracket and the body mounting tab.

If that ground wire does not have good ground, it will set steering codes, not sure about no start issue but it's possible as well.

BD

It has a jlt catch can but no ground. Car also throws a check charging system service now light when cranking. This might be the culprit to all my issues.

 

[ttyoye]

It has a jlt catch can but no ground. Car also throws a check charging system service now light when cranking. This might be the culprit to all my issues.

 

[Buldawg76]

That ground wire does not look good at all. Is it a GT or EB car. .

BD

 

[ttyoye]

That ground wire does not look good at all. Is it a GT or EB car. .

BD

gt

 

[Buldawg76]

Ok, not sure if the GT has same ground wire that should be attached on a small tab sticking out from strut tower right near the battery area. If it does have the tab is that what the catch can is mounted on and if so, is there a ground wire there also. If there is make sure it is between the screw and catch can mounting bracket not between the catch can and tab on strut tower for a proper ground.

It may be that someone has moved than ground to the battery terminal you pictured that looks questionable.

BD

 

[ttyoye]

Ok, not sure if the GT has same ground wire that should be attached on a small tab sticking out from strut tower right near the battery area. If it does have the tab is that what the catch can is mounted on and if so, is there a ground wire there also. If there is make sure it is between the screw and catch can mounting bracket not between the catch can and tab on strut tower for a proper ground.

It may be that someone has moved than ground to the battery terminal you pictured that looks questionable.

BD

some oem stuff has been re located. looks like this wire goes down to starter

 

[Buldawg76]

May be loose connections under car or at starter. Some positive feeds are picked up from the positive side of starter. Loose connection there could be issue.

BD

 

[Buldawg76]

Check all fuses also

 

[ttyoye]

May be loose connections under car or at starter. Some positive feeds are picked up from the positive side of starter. Loose connection there could be issue.

BD

We’ve checked all fuses/relays and replaced a lot. Checked all ground and wires everything is fine.

 

[Skye]

"some oem stuff has been relocated."

What was relocated? Why? Who did the work?

 

[ttyoye]

"some gem stuff has been relocated."

What was relocated? Why? Who did the work?

Well as I mentioned the car is a tt car (top mount) so things like the alternator and engine bay fuse box has been relocated.

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