Electrical problem -- 87 GT

cobralini · July 22nd, 2006, 11:19 PM

Hello,

When I turn on my head lights my fuel guege reads full tank even when it is almost empty, when I turn off the head lights the fuel reads right again ....what is this?

ChrisJ · July 22nd, 2006, 11:46 PM

Sounds like a short...

turp · July 22nd, 2006, 11:53 PM

Start in the dash and read back from there.

ChrisJ · July 22nd, 2006, 11:54 PM

Looks closely around the headlight switch...And the gas gauge...See if wires are touching or what...

Mustang8719 · July 23rd, 2006, 12:20 AM

I would also check Main grounds from engine to Body.

I had a Bad engine ground and the more things I turned on the higher my Temp gauge went.

I ran a new ground wire from the sway bar bolts to the Head.

ChrisJ · July 23rd, 2006, 12:25 AM

Originally Posted by Mustang8719

I would also check Main grounds from engine to Body.

I had a Bad engine ground and the more things I turned on the higher my Temp gauge went.

I ran a new ground wire from the sway bar bolts to the Head.

Ground Wires can cause some crazy $hit to go on if they are not properly grounded...

Mustang8719 · July 23rd, 2006, 12:27 AM

Originally Posted by ChrisJ

Originally Posted by Mustang8719

I would also check Main grounds from engine to Body.

I had a Bad engine ground and the more things I turned on the higher my Temp gauge went.

I ran a new ground wire from the sway bar bolts to the Head.

Ground Wires can cause some crazy $hit to go on if they are not properly grounded...

Yes thats why I wanted to share.

July 22nd, 2006, 11:19 PM	#1
cobralini Regular Join Date: May 2006 Posts: 182 iTrader: 0 reviews	Electrical problem -- 87 GT Hello, When I turn on my head lights my fuel guege reads full tank even when it is almost empty, when I turn off the head lights the fuel reads right again ....what is this?

July 22nd, 2006, 11:46 PM	#2
ChrisJ RLY SRS Join Date: Aug 2005 Location: Ft. Meade, MD Posts: 38,220 Blog Entries: 4 iTrader: 10 reviews	Sounds like a short... __________________ 2008 Acura TL Type-S - 2008 EB Ford Expedition - 2002 Boosted GT - Sold Facebook Google+

July 22nd, 2006, 11:53 PM	#3
turp My Stallion is Bigger! 1989 Eddie Bauer Bronco 3 feet... Join Date: Aug 2005 Location: VA Beach Posts: 3,012 iTrader: 0 reviews	Start in the dash and read back from there. __________________

July 22nd, 2006, 11:54 PM	#4
ChrisJ RLY SRS Join Date: Aug 2005 Location: Ft. Meade, MD Posts: 38,220 Blog Entries: 4 iTrader: 10 reviews	Looks closely around the headlight switch...And the gas gauge...See if wires are touching or what... __________________ 2008 Acura TL Type-S - 2008 EB Ford Expedition - 2002 Boosted GT - Sold Facebook Google+

July 23rd, 2006, 12:20 AM	#5
Mustang8719 Regular Join Date: Apr 2006 Location: Orlando Posts: 152 iTrader: 0 reviews	I would also check Main grounds from engine to Body. I had a Bad engine ground and the more things I turned on the higher my Temp gauge went. I ran a new ground wire from the sway bar bolts to the Head. __________________ Eibach lowering springs,Intake ported to Max,Electric cooling fan,120Amp Alt.,FlowMasters,Jacobs FC1000 Ignition system with coil,King Cobra Clutch,APC Racing Seats

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