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A Few Problems With A 95

Yamashee

By Yamashee
in Ask A GM Technician

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Yamashee Enthusiast

Yamashee

Posted
Posted

My 95 gmc has lost the speedo, tach, odo, 1st and overdrive. There was a post somewhere on this site that had solutions to this problem and now I can't find it. One solution was the ignition switch and I think I have it narrowed down to that. There was mention of wiring in a relay instead of changing the whole ignition switch. If anyone knows how or knows where I can find the post it would be greatly appreciated.

Zembonez Senior Enthusiast

Zembonez

Posted
Posted
It needs an ignition switch.

Yip. It was somewhat common. The key symptom is loss of gauges if I remember right.

Yamashee Enthusiast

Yamashee

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I've narrowed it down right to the pink/white wire. When I hook direct power to it everything works. I would like to install a relay as a safeguard. It was mentioned in a previous post. I just can't remember which wires needed to be hooked up to where on the relay.

hubbycap Senior Enthusiast

hubbycap

Posted
Posted
I've narrowed it down right to the pink/white wire. When I hook direct power to it everything works. I would like to install a relay as a safeguard. It was mentioned in a previous post. I just can't remember which wires needed to be hooked up to where on the relay.

 

 

Wouldn't a new ignition switch possibly apply direct power to that pink/white wire?

hubbycap Senior Enthusiast

hubbycap

Posted
Posted

Terry,

If you're trying to get your rig ready for tomorrow, why don't you just grab a hot and use a toggle switch to the wire you found. It could dangle under the dash and you could switch it when you start/stop the engine. This could get you by a day or two until you can get another ignition switch. You wouldn't need the lock cylinder.

 

This relay thing could be accomplished by tapping another hot off of the ignition switch that was "hot on run/start" and using it to energize the coil of the relay AND supply hot to the pink/white wire. Consideration should be made as to whether that wire was fused after the point you connect to it.

 

I can't draw a schematic here but the alternate hot off of the ignition would connect to the relay and jump to one side of relay switch points. The pink would connect to the other side of that switch point and of course a ground for the coil. 4 wires. Good luck.

pennzoil29 Senior Enthusiast

pennzoil29

Posted
Posted
Terry,

If you're trying to get your rig ready for tomorrow, why don't you just grab a hot and use a toggle switch to the wire you found. It could dangle under the dash and you could switch it when you start/stop the engine. This could get you by a day or two until you can get another ignition switch. You wouldn't need the lock cylinder.

 

This relay thing could be accomplished by tapping another hot off of the ignition switch that was "hot on run/start" and using it to energize the coil of the relay AND supply hot to the pink/white wire. Consideration should be made as to whether that wire was fused after the point you connect to it.

 

I can't draw a schematic here but the alternate hot off of the ignition would connect to the relay and jump to one side of relay switch points. The pink would connect to the other side of that switch point and of course a ground for the coil. 4 wires. Good luck.

Pretty ingenious. :(

Alljackedup408 Enthusiast

Alljackedup408

Posted
Posted

is the problem fixed?? i work at a dealer here in florida.. and ive seen a few trucks with those issues.. and it turns out its the Wheelspeed sensor on the tranny for the rear. jus throwin that out there.

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