Theft light and starting issue

sharkbait · March 27th, 2011, 02:32 AM

Well i recently did a battery relocate to my car.

I worked on the car for about 2-3 days and the battery was out of it the entire time.

Well i fired her up tonight and im having some issues I cant figure out.

Background : I have a fan switch wired to a wire on the pcm that ground out the wire causing the hi speed fan to kick on...cant remember which wire but you know what im talking about.

Ok well I went and started my car with the intentions of driving it a little and i turned the fan to the OFF position. The car died. I turn the fan back on and the car start up but the theft light blinks.

If you turn the key to the run position with the fan off the CEL light dosnt light up...but if you turn the fan to the ON position it lights up like normal.

The battery is wired to go to the starter then a terminal which goes to the power distribution box. The wire from the battery to the starter is 2 gauge wire. The car is grounded to the chassis.

Any ideas guys im trying to get my tune next week so i need some help...

MikeJones · March 27th, 2011, 03:07 AM

Wait.. So it starts?

99GT35thLE · March 27th, 2011, 06:34 AM

Personally I didn't like the wiring going from the batt to the starter first.

I used a distribution box mounted up where the batt was located. Ra the wire from the batt to the distribution box. Connected the original positive batt cable to distribution box.

IF it was working fine before the battery rewiring, then it's got to be your wiring.

Try this, remove the batt cable from the starter. Connect the old starter wire. Use a battery jumper cable and attach one end to the wire coming from the battery and the other end to the fuse box lug. See what happens. If the problem disappeared, then you now know how to rewire it.

sharkbait · March 27th, 2011, 08:12 AM

Yes the car starts but only if the fan is switched ON.

It just confuses me because the fan draws more power you know? So why would you need to turn the fan on to start the car.

Also why does the check engine light go away when you put it in the run position if the fan is off.

sharkbait · March 27th, 2011, 04:17 PM

found a ground in the engine bay undone.

Reconnected it and it all works...

just wanted to post my solution

March 27th, 2011, 02:32 AM	#1
sharkbait Hooo Ha Ha 1997 Mustang GT 11.65 @ 115 Join Date: Apr 2009 Location: Pasadena MD Posts: 9,743 iTrader: 10 reviews	Theft light and starting issue Well i recently did a battery relocate to my car. I worked on the car for about 2-3 days and the battery was out of it the entire time. Well i fired her up tonight and im having some issues I cant figure out. Background : I have a fan switch wired to a wire on the pcm that ground out the wire causing the hi speed fan to kick on...cant remember which wire but you know what im talking about. Ok well I went and started my car with the intentions of driving it a little and i turned the fan to the OFF position. The car died. I turn the fan back on and the car start up but the theft light blinks. If you turn the key to the run position with the fan off the CEL light dosnt light up...but if you turn the fan to the ON position it lights up like normal. The battery is wired to go to the starter then a terminal which goes to the power distribution box. The wire from the battery to the starter is 2 gauge wire. The car is grounded to the chassis. Any ideas guys im trying to get my tune next week so i need some help... __________________ 410rwhp 520rwtq @ 12.9 psi

March 27th, 2011, 03:07 AM	#2
MikeJones Hardcore Enthusiast 2002 Mustang GT 13.7@103 Join Date: Jun 2009 Location: Stoon, Saskatchewan Posts: 2,913 iTrader: 0 reviews	Wait.. So it starts? __________________ Mod6 Bigbore Kooks (parting out 2v motor) N/A 5.3 4v Build http://www.moddedmustangs.com/forums...ing-build.html

March 27th, 2011, 06:34 AM	#3
99GT35thLE Hardcore Enthusiast 1999 GT 35th LE Join Date: Dec 2009 Location: Jacksonville, Florida Posts: 1,428 iTrader: 0 reviews	Personally I didn't like the wiring going from the batt to the starter first. I used a distribution box mounted up where the batt was located. Ra the wire from the batt to the distribution box. Connected the original positive batt cable to distribution box. IF it was working fine before the battery rewiring, then it's got to be your wiring. Try this, remove the batt cable from the starter. Connect the old starter wire. Use a battery jumper cable and attach one end to the wire coming from the battery and the other end to the fuse box lug. See what happens. If the problem disappeared, then you now know how to rewire it. __________________ Drive it like you stole it

March 27th, 2011, 08:12 AM	#4
sharkbait Hooo Ha Ha 1997 Mustang GT 11.65 @ 115 Join Date: Apr 2009 Location: Pasadena MD Posts: 9,743 iTrader: 10 reviews	Yes the car starts but only if the fan is switched ON. It just confuses me because the fan draws more power you know? So why would you need to turn the fan on to start the car. Also why does the check engine light go away when you put it in the run position if the fan is off. __________________ 410rwhp 520rwtq @ 12.9 psi

March 27th, 2011, 04:17 PM	#5
sharkbait Hooo Ha Ha 1997 Mustang GT 11.65 @ 115 Join Date: Apr 2009 Location: Pasadena MD Posts: 9,743 iTrader: 10 reviews	found a ground in the engine bay undone. Reconnected it and it all works... just wanted to post my solution __________________ 410rwhp 520rwtq @ 12.9 psi

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