Quick Blinker

IN my 88 GMC I have a problem with my right side blinker flashing really fast. I noticed however that the constant light on my right taillight would not work during signalling so I figured I had a burnt bulb. I replaced the bulb (which was not burnt but I figured what the hey) and the problem persisted. I then tried changing the flasher itself but anytime I put a new one in nothing would work at all not even clearance lights. If anyone has a solution to this problem it would be greatly appreciated.

Do your brake lights work? i had a similar problem with my 94 gmc. it ended up being the brake pedel switch. it is a whiteish color box with a button that is depressed the brakes come on.... your situation still sounds like a flasher issue.

Nope the brake lights are still working fine, its just one bulb. The one bulb isn't working right. Its a dual filament bulb for flash and constant its just that when the brake is pressed the second filament won't light making it look like a bulb is burnt out when it actually isn't.

A bad ground is usually at fault when you get strange lighting problems like that

Hello, New to this site so hope I am sending this correctly.
I have a 98 GMc Sierra. I had the same problem with the quick blinking light. First my passenger side no blinker was working so I replaced the bulb. No help there. I dug a bit deaper with a 12 volt probe tester and found no juice to the plug. I replaced the whole tail light assembly ( not the red lense but the part that holds the bulbs) to the tune of about 50.00. It worked fine. about a year later the driver side did the same. I took out the bulb assembly that holds the bulb and I used the pointed end of the 12 volt probe and I expanded the copper contacts that hold the bulb and walla there I had juice. I guess the copper contacts are so soft that they loosen there grip on the bulb. Of course the dealer or parts people never heard of this or would not inform me as they want the bucks. Hope this helps if you have not already reaplaced or fixed the problem.
I have the problem of the heater switch only working on high. I bought the heater resistor but am having trouble locating where it goes. My heater is inside the cab so maybe removeing the glove box might help. Good luck.
Randy

the quick blinking is because the tail light sockets are coroded. gm has an updated part for this with different bulbs because the factory ones are junk. i'd say half of the chevy's on the road suffer from this problem

i think your heater resistor is under the hood it's somewhere on the airbox

i think your heater resistor is under the hood it's somewhere on the airbox
My heater motor is in the cab on the passenger side. 98 gmc. I know the older chevys had the motor in the engine compartment correct. I guess I need to remove the glove box to see the resistor. Ya think?? I don't want to tear into this withought having some sort of idea where I am heading. Thanks for any advice.
randy

try to follow the wiring from the heater motor it should lead you to the resistor push it the catches on the glove box and you should be able to fold it down to the floor with out removing it

thanks I will give it a try once it stops raining here.

I had the same problem recently with my 99 GMC Sierra 1500. The right blinker started blinking rapidly one day. I changed out the bulb (mine actually had burned out), but 5 minutes later, the rapid blinking started again and again no brake light or turn signal.

I took the tail light socket assembly into the parts dept of the GM dealership. After the parts guys looked at it, he told me this:

Where the bulb plugs into, there is this paste-like substance that the factory puts into the sockets that is used to prevent the effects of moisture on the metal connectors of both the socket and the bulb. I forget what he called this stuff, but besides its purpose to prevent moisture in the socket, it is also electro-conductive so that the bulb gets juice from the socket. Well, this is ok until the substance dries out.

So, in my case, this stuff was dried to the point of being clay-like and the bulbs were not making a good connection in the socket. You need to scrape out that stuff from the metal connectors in the sockets. Be sure to disconnect the wires from the tail light socket assembly first, as you will probably use something metal to scrape out the dried goop and you don't want to short anything. I used a thin nail, but what would probably work better is a dental scraping type tool. You can get them at a hardware store or Home Depot.

I will also add that I live in Arizona, where it is very dry, not much rain. So, that moisture paste stuff I don't really need. If you live in an area that rains or snows alot, or you live on the coast, my solution may work temporarily until moisture has it's way with the sockets! Maybe a new tail light socket assembly might be the best bet...

Good luck!

SunDog67
1999 GMC Sierra 1500 Ext. Cab 305 (5.0 Litre)

the quick blinking is because the tail light sockets are coroded. gm has an updated part for this with different bulbs because the factory ones are junk. i'd say half of the chevy's on the road suffer from this problem

I've got the same problem with my 94 Silverado (as of today). Can't buy a replacement panel from an auto parts store, so I trying to clear the bulb and assembly sockets to see if I get better contact...

I've got the same problem with my 94 Silverado (as of today). Can't buy a replacement panel from an auto parts store, so I trying to clear the bulb and assembly sockets to see if I get better contact...


I would again use a pointed object to open the brass prongs to make them tighter on the bulb. As one user pointed out earlier, get the paste that was used on the prongs originally or maybe use a light coating of grease to prevent moisture from building on the contacts. But first get the prongs to make contact with the bulb. I have not had any problems with mine that I repaired in feb. of 04. Knock on wood but at least now I know how to fix it. Good luck.

I had the same problem with my 1989 GMC Seirra. I went to a junkyard and bought a new circuit board (the piece that holds the three light bulbs) this should fix the problem. It worked for me. A minor downside, you have to buy a different type of light 31577LL