1970 gto electrical issues

455gto · Poncho Master!

1970 gto electrical issues

4SPEED427 · A Poncho Legend!

Not sure about the tach but the windows should be an easy trace.

There should be a relay, correct?

3 wires to it? Likely one small pink one and two larger, maybe red?

One red live all the time.

Pink should be live with the key on.

As soon as the pink goes live, the other big one (red?) should go live too?

4SPEED427 · A Poncho Legend!

Maybe I better see if I have a schematic because I thought the windows only had a circuit breaker, no fuse. You found a fuse labeled power window?

427carl · A Poncho Legend!

455gto · Poncho Master!

Carl Stevenson wrote:

Not sure about the tach but the windows should be an easy trace.

There should be a relay, correct?

3 wires to it? Likely one small pink one and two larger, maybe red?

One red live all the time.

Pink should be live with the key on.

As soon as the pink goes live, the other big one (red?) should go live too?

There was a 68 GTO rag at a show in Oregon with the same problem. Someone told them there is a relay behind the kick panel. If this is true than Beaumonts should have the same relay as well?
I'll check for the pink wire.

-- Edited by 455gto on Thursday 10th of June 2010 10:54:23 AM

455gto · Poncho Master!

After waiting for a new relay.....found out that was not the problem

Found a wire wasn't hooked up by the firewall still no power

After taking out two wires that went nowhere....tried this pink wire to the fuse box and now have working windows biggrin

Also got my tach working as well

-- Edited by 455gto on Monday 28th of June 2010 10:04:46 AM

427carl · A Poncho Legend!

Good news

jmont64 · Canadian Poncho Superstar!

It's nice when the solution is found like that. I remember on my first truck when I was 17 the electrical situation wasn't great and the horn and the brake lights didn't work. I found a couple wires under the cab that went nowhere so I hooked them together. I then got my mom to come out and step on the brakes to see if the brake lights worked. When she stepped on the brakes the horn sounded so I had it fixed in no time and was a happy young electrical genius. Sometimes things can be so simple.

4SPEED427 · A Poncho Legend!

455gto wrote:

After waiting for a new relay.....found out that was not the problem Found a wire wasn't hooked up by the firewall still no power After taking out two wires that went nowhere....tried this pink wire to the fuse box and now have working windows
Also got my tach working as well

-- Edited by 455gto on Monday 28th of June 2010 10:04:46 AM

There's a certain satisfaction in winning an electrical battle, isn't there?

Glad you got it!

455gto · Poncho Master!

Yeah it's nice having working windows. I was driving down the road with my door open. Wow is that black int is hot.
I have a wire that's in the engine bay that has power to it confuse

on the drivers side that goes half way to the battery. Not long enough to be used for a hood lamp.

-- Edited by 455gto on Monday 28th of June 2010 11:00:43 PM

4SPEED427 · A Poncho Legend!

What colour and gauge is it?

455gto · Poncho Master!

Here's the wire that has me stumped.

4SPEED427 · A Poncho Legend!

It's a bit tough to tell the colour in the pic. Is it black, or is it taped up?

Can you take a shot from farther back giving a bit of idea as to where it goes in to a harness or anything?

Power always or key on only?

455gto · Poncho Master!

It's black and power on always

4SPEED427 · A Poncho Legend!

Your car doesn't have factory air by chance, does it?

4SPEED427 · A Poncho Legend!

I'm trying to think of where there are live wires.

-to alternator

-to high blower relay on A/C cars

-to ignition switch

-to horn

-to stop lamps, interior lamps, trunk lamps

-lighter

-headlamp switch

455gto · Poncho Master!

Carl Stevenson wrote:

I'm trying to think of where there are live wires.

-to alternator

-to high blower relay on A/C cars

-to ignition switch

-to horn

-to stop lamps, interior lamps, trunk lamps

-lighter

-headlamp switch

It's not an A/C car. I'll check my lighter..... could it be a hood lamp?

4SPEED427 · A Poncho Legend!

Actually, I was just kind of thinking in print when I did that list.

Stuff like lighter and dome/courtesy lamps pull power from the fuse box I think.

It certainly could have been a hood lamp. I think the power wire for them was black.

That's what seems unusual. Seldom are power wires black on GM.

455gto · Poncho Master!

Mybe your right on the lamp stuff. It comes from inside the car. More than likely the fuse panel. When I got the car it was a drag car ...wiring and battery in the trunk and added gauges. Now finding all the right wires and some that are hacked is a little hard.

car 024.jpg

It comes out with that orange wire painted black....Orange is windows to the relay with all those wires at the top of picture.
Thanks Carl for helping me...two heads are better then one

4SPEED427 · A Poncho Legend!

Ok, that helps a bit.

Next I think I would put a test light on it and pull fuses until the test light goes out. That would help narrow down which circuit it's on at least.

455gto · Poncho Master!

Thanks.
I'll have to get a new test light. Today was the last day of school

Now I have them all day and the car comes last