2002 Tacoma right turn signal kills truck

My 2002 Tacoma, when heater fan is running and you engage the right turn signal the truck dies. When the fan is off you can engage the right turn signal and all is well. I have been looking for missing ground wires or cut wires but no luck. Does anyone have any suggestions?

 

So you can leave you truck parked anywhere with the doors open and the keys in? You just beet to leave the turn signal on and your fan on?

that pretty cool!


Sorry can’t help.

 

Left turn signal no problem? What about the Hazard lights??

Sounds like your system voltage is dropping to low .What is the voltage with all the loads on?

The ECM goes night night .

Does it die slowly like the fuel is being shut off or just like the switch was turned off??

 

The truck dies immediately. The left turn signal is no problem, the hazards will kill it also.

 

@patriotdadd did you ever find a fix? I’m having the same issue

 

I had this issue ended up being bad turn siginal switch