I will be working on my friends 77 vette that has no turn signals. That turn signal switch was replaced but still no flashers. I have power at the fuse block but at the flasher I have none. Looking at the wiring diagram it should be a straight run from the fuse box to the flasher. This circuit also feeds power to the back up lights which he also doesnt have. Looking under the dash to trace this wirng looks to be a nightmare but I am one that doesnt like to just run new wires like a "bubba" would do. His heater core is leaking so it looks like a good time to take care of that problem since it looks like much of the under dash area needs to be removed for this repair. Any ideas where to start and does anyone have a procedure for dash removal that is easy to follow? This car is equipt with A/C as well.
Thanks Rodney
rod75152006-11-23 07:04:01

I don't know how different the wiring is in a '77 compared to my '78, but the hazard flasher in a '78 is inside the console. The flasher relay on the fuse box should be for turn signals.

Bubba strikes again.

The t-sig flasher should be on the pass. side, behind the dash/map-pocket area. You can reach under there and feel it, as it is mounted in a little "clip" there. The flasher in the fuse-box is for the hazzards.
Have you tried jumpering a hot-wire to the flasher, just to see if the sigs would work?

Bruce, you are correct in your locations, tho, as the '78-ups are different.

Rod, if you do a "search" on the dash removal/heater core replacement, you should find some info on that.

Joel...

I can tell you my hazard flasher relay is in the console in my '78 and the turn signal flasher is on the fuse panel. It all looks like factory installations, not something Bubba did. The owner's manual shows the flasher on the fuse panel, but doesn't mention the location of the hazard flasher relay other than how to activate the switch on the steering column.

Maybe the reason for a change is in '78 Chevy began installing a real glove box in the car, making necessary a move for some components like flashers.

Yeah, I agree with the reason for the change. I know a lot of folks have looked for that darned hazzard flasher, not knowing it was "hidden" there, under the shifter console!

If you take the carpeted side panel off, you can see the flasher in there, though to replace it, it would be easier to remove the console bezel, which is a bit of a pain, especially if you have an automatic transmission. Not tough at all, but you just have to make sure you don't screw up the alignment of the shifter gear indicator...an easy thing to do, but easily corrected. If you have small hands instead of big mitts like mine, maybe you can swap out the flasher relay without taking the top bezel off.

[QUOTE=Gunslinger]Joel...

I can tell you my hazard flasher relay is in the console in my '78 and the turn signal flasher is on the fuse panel. I......[/QUOTE]

on my 78 it is like Joel described; hazzard flasher on the fusebox and turnsignal under dash on passenger side and under shifter console the alarm flasher.

but then again  this discussion about the 78 is not what the topic was not about

art-corvette

Be carefull of the flasher you find in the console.  Some of them, like mine, are part of the security system.  Its a flasher that controls the horn alarm.

Yes, the flasher is located under the dash on the passenger side, very easy to get to. I have not run a jumper wire to it yet but hope to start working on it this Wednesday. The wiring diagram also shows the security flasher under the console on the 77. Not what I am looking for. I hate working on electrical issues but I guess its something I need to do for this friend. He has very limited mechanical abilty! But a great friend. I will do a search for the dash removal. The GM manual is not very clear for this. Thanks for all your help. I will let you know how I make out in the next few weeks.
Rodney

Heater Core Search Listing

Here are three pages on the subject, if it helps.