Hey guys i got a problem with my 97 3500 5.9 cummins with the nv4500 backed up to it. The driver side front blinker is not working, i have changed the bulb and the relay to no avail. I tried tracing the wires but never found a break or worn spot. I searched the web and the forum but havent found anything matching my problem. Any help is greatly appreciated!

 

Pull the bulb and make sure your getting power to the center post, as the out side is ground .... If no power, post again...

 

There isn't a center post that i know of only two on the left and two on the right

 

Ahh, 3156 bulb ??

2 should have power, one for marker the other would be blinker powered

 

Yes and i have traced that wire and found 0 breaks or wear marks so thats where I'm drawing a blank.

 

ok , Your gonna need to check the blinker multi-function switch , I think your gonna find there is a singnal in but not out....( basically make sure its putting a signal to the blinker relay, might try a known good blinker relay...)

 

What ahould be the best method to test this?

 

you will need to back plug check = take a test light, turn on ignition, and test each wire on the truck side ( not the switch side of wiring plug) , and see if your getting the signal there, if not, you have your problem solved ( most likley it would be a bad contact, buy a new switch ) .. if not then test @ blinker realy on left side of dash in the fuse panel... and such forth until you reach your plug @ blinker buld ... somewhere along the line you gonna reacjh a point where there is not a signal ... so from that point to the last point you had a signal is going to be the trouble section of wiring ...

I know, sounds real simple ... been there ( I own a Ford ) ..LOL