Lately my right turn signal has been working intermittently, going from normal to fast blinking with a 'bulb out' message in the cab. It doesn't seem to change with turning the truck on or off, as it can be flashing fast and return to normal in one trip or vise versa. I've changed the bulbs already but no success. According to many forums the next step would be to change the flasher relay, but in my model there is no flasher relay on its own. Seems to me like perhaps it could be a bad ground, but thought I'd throw it out there to see if anyone else has any suggestions or experience with this type of problem.

 

When in the mode where the signal is flashing fast have you walked around the truck to make absolutely certain all bulbs are working properly? Have you installed any LED bulbs in place of factory non-LED bulbs?

-Rod

 

Hi Rod,
When the signal is flashing fast the front signal is not working, the back signal is flashing as fast as it is in the cab. Just this morning it was flashing quick and then suddenly it slowed down. I got out and checked that now the front flashing light was indeed working correctly. I have not changed the bulbs to LED, just the stock recommended version.

 

Unfortunately each turn signal bulb is separately controlled via the TIPM so without being instrumented to measure voltage to the bulb and from the TIPM when the hyper flash is occurring it's going to be difficult to determine if the issue is the socket, the wiring, or the TIPM. Is it always the same direction that doesn't work, or is it randomly either front (left or right) that doesn't work?

If you're comfortable with a multimeter and checking wiring, I'd suggest you study the wiring for the suspect turn signal or signals and, if possible, backprobe at each end, insulate the back probes, and have it ready to test. Then if you get to a point where the signal is acting up and you can safely take some measurements, jump out and see if there is voltage first from the TIPM, then ground from the TIPM, followed by at the bulb (if the TIPM is putting out voltage).

-Rod

 

You either have a loose connection or bad bulb in the front one that goes out. I bet it's just the bulb. It's not uncommon for your symptoms due to a broken filament in the bulb. Sometimes just a little bet of shaking causes the broken ends of the filament to touch and it looks like it's working. Try a new bulb.