2005 suburban blinker

[jimmyrig]

When I turn on my left blinker, it blinks real fast. The front blinker works, but the rear one doesn't. I replaced the bulb in the rear, but it made no difference. Any suggestions what the problem might be.

 

[zrxkawboy]

There is likely either a socket or wiring/ground issue with the rear blinker.

 

[MParr]

The socket is probably corroded.

 

[jimmyrig]

When I turn on my left blinker, it blinks real fast. The front blinker works, but the rear one doesn't. I replaced the bulb in the rear, but it made no difference. Any suggestions what the problem might be.

The socket is probably corroded.

When I took the bulb out, the socket looked brand new. Must be the wiring.

 

[mk378]

Look for a plug underneath the back where the light wires leave the harness on the frame and go up into the body. This is where a trailer harness adapter would be plugged in. Common for the plug to get loose if someone has ever used a trailer adapter.

 

[Owen Lucas]

If it's none of the above, could be the blinker relay.