electrical prob with wifes 90GT, please help

Xtreme GT · 07-08-2001, 05:29 PM

When you turn the headlights on,the tach drops to zero,both turn signal indacators come on,temp gauge goes all the way up past 270,fuel gauge shows full. oil pressure gauge is not affected. It is a 90GT stock auto,It was fine then It was parked 3 weeks cause of radiator probs,after I get the radiator in It gives me this problem 3 days later. I've checked the wires under the hood nothing looks shorted or pinched.
Does anyone have any ideas?
Thnks for any help

Capri306 · 07-08-2001, 10:09 PM

Check the headlight connections and the wires going along the radiator's cross brace thoroughly, 'cause that's the only area that's changed on the car really. You're probably going to have to tear into the instrument cluster and look closer if you can't find the problem. My guess is a wire crossed somewhere. It's not scary as it sounds, though. You need a phillips screwdriver, ¼-inch ratchet, a 3/8- or 5/16-inch socket with extension, a ¼-inch socket, and a T15 Torx bit...that and a little patience. Good luck.

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Capri306, Moderator, The Mustang Works Online
1979 Mercury Capri, 5.0L -- C4 -- 2.73
1987 Mustang LX Notch

joe4speed · 07-09-2001, 12:57 AM

I had that same problem when my battery was going dead, when it would get low volts, all the gauges would go up... weird. Worked fine when I got the new battery...

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Joe! 1988 GT, 167,000 miles!!! 13.58@105mph Check out my listing! Click here! Or my website:www.joe4speed.com
99 Ninja ZX-6R:10.32@135mph!
1993 Olds Eighty Eight LSS 16.40@88.8mph

PKRWUD · 07-09-2001, 06:49 AM

It sounds like a ground problem. I will also recommend looking around the radiator for loose ground wires. You might also want to trace the wires from the headlights themselves and locate their ground.

Take care
~Chris

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Retired Moderator
MustangNet

My site: JimPorterRacing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!

07-08-2001, 05:29 PM	#1
Xtreme GT Registered Member Join Date: Mar 2001 Posts: 1	electrical prob with wifes 90GT, please help When you turn the headlights on,the tach drops to zero,both turn signal indacators come on,temp gauge goes all the way up past 270,fuel gauge shows full. oil pressure gauge is not affected. It is a 90GT stock auto,It was fine then It was parked 3 weeks cause of radiator probs,after I get the radiator in It gives me this problem 3 days later. I've checked the wires under the hood nothing looks shorted or pinched. Does anyone have any ideas? Thnks for any help

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07-08-2001, 10:09 PM	#2
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	Check the headlight connections and the wires going along the radiator's cross brace thoroughly, 'cause that's the only area that's changed on the car really. You're probably going to have to tear into the instrument cluster and look closer if you can't find the problem. My guess is a wire crossed somewhere. It's not scary as it sounds, though. You need a phillips screwdriver, ¼-inch ratchet, a 3/8- or 5/16-inch socket with extension, a ¼-inch socket, and a T15 Torx bit...that and a little patience. Good luck. ------------------ Capri306, Moderator, The Mustang Works Online 1979 Mercury Capri, 5.0L -- C4 -- 2.73 1987 Mustang LX Notch

07-09-2001, 12:57 AM	#3
joe4speed He said Member...heh, heh Join Date: Sep 1999 Location: Jupiter, Florida U.S.A. Posts: 3,718	I had that same problem when my battery was going dead, when it would get low volts, all the gauges would go up... weird. Worked fine when I got the new battery... ------------------ Joe! 1988 GT, 167,000 miles!!! 13.58@105mph Check out my listing! Click here! Or my website:www.joe4speed.com 99 Ninja ZX-6R:10.32@135mph! 1993 Olds Eighty Eight LSS 16.40@88.8mph

07-09-2001, 06:49 AM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	It sounds like a ground problem. I will also recommend looking around the radiator for loose ground wires. You might also want to trace the wires from the headlights themselves and locate their ground. Take care ~Chris ------------------ Retired Moderator MustangNet My site: JimPorterRacing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!