blinkers

[00Sierra1500]

Truck was in an accident a few months ago and since the accident there have been various problems with the blinkers. Sometimes a blinker will flash twice as fast as normal, sometimes all blinkers will stop working. Because of my provincial insurance corporation I am stuck with the first shop I brought my truck into. Every time I bring it in (3 times noe) for this problem the guy at the dealership isn't exactly sure what the technicians did to fix it. He usually tells me they replaced some bulbs checked some wires and now it works. Right now the rear left blinker and brake light don't work. I changed the bulb and that's not the problem. left blinker blinks twice as fast as it should. front left blinker is ok. i checked the fuse and it's ok. Is this a broken wire somewhere?

Also my tow/haul option doesn't work since the accident. It worked perfectly right up intil the accidend (girlfriend drove the truck straight into a power pole) and doesn't work now. The shop tells me that the switch failed and this has nothing to do with the accident. Any ideas on how a head on collision with a hydro pole could damage the tow/haul circuitry?

[Mhu]

When your flasher increases its "blink" rate, it typically indicates an open circuit. Either a burned out lamp, broken wire, lost ground connection, etc. If you remove the lamp and use a voltage tester you can determine if power is reaching the lamp socket. With the same tool, using the continuity setting, you can determine if the lamp socket is properly grounded.
Do your dash lights work? If not, check the tail lamp fuses. Tail lamps are often fused with the dash lights so that when you notice that you have no dash lights you'll be alerted to the problem.
Blown fuses, especially following an accident, can indicate a pinched wire shorting to ground. Also, following accident repairs, connectors may be left unconnected or losely connected. Check all connectors to make certain all of them are tightly latched.
Many repair shops HATE intermittent electrical problems and the unscrupulous will "shuck and jive" so that you'll go away. At todays shop rates they lose big bucks on the time spent chasing down such issues and few customers would pay the hourly rate for that type of service.
Good luck......

[rollie1960]

Originally Posted by Mhu

When your flasher increases its "blink" rate, it typically indicates an open circuit. Either a burned out lamp, broken wire, lost ground connection, etc. If you remove the lamp and use a voltage tester you can determine if power is reaching the lamp socket. With the same tool, using the continuity setting, you can determine if the lamp socket is properly grounded.
Do your dash lights work? If not, check the tail lamp fuses. Tail lamps are often fused with the dash lights so that when you notice that you have no dash lights you'll be alerted to the problem.
Blown fuses, especially following an accident, can indicate a pinched wire shorting to ground. Also, following accident repairs, connectors may be left unconnected or losely connected. Check all connectors to make certain all of them are tightly latched.
Many repair shops HATE intermittent electrical problems and the unscrupulous will "shuck and jive" so that you'll go away. At todays shop rates they lose big bucks on the time spent chasing down such issues and few customers would pay the hourly rate for that type of service.
Good luck......

Check the shop where your Truck was repaired and see what kind of warrenty that they gave you sometimes lifetime at most places if not go over the service department head man and talk to the owner of Dealship then things will start to happen meaning getting your truck fixed right.
Good luck! RS