turn signals

[71highboy]

hi all.my problem is my right turn signal only blinks when the engine is running.if i turn the key to the on position it will not blink.left side is ok.any ideas ?1971 f250 thank you

[Thunderfoot]

Check to make sure you don't have a burnt out bulb front or rear, then check the ground connections on the light housings.

[71highboy]

all lights are ok.the ground is good.its not that big of a deal i was just trying to figure out why it wont blink with the key on.thanks

[Thunderfoot]

It should work without the motor running, it will probably present itself later on when it stops working even with the engine running...
The flasher has to have a load on it (all lights working good) to make it blink, with the engine running you have more voltage going through the circuit and it will help overcome a bad connection if there is one somewhere, it could be the switch or the wiring to the lights, to the bulbs... Also a flasher going bad may cause this, try swapping the Emergency flasher with the turn signal one and see if it still does it.

[71highboy]

will try all of those.thank you