southfillyboy2p0

Last week my passenger side turn signal went out only when the headlights are on. The bulb only lights up when I signal I am turning. Its not a major issue, its just annoying the hell out of me that the one side isnt one. I tried a spare bulb. Any ideas?

southfillyboy2p0

Anyone? This is driving me crazy.

cliffyk

The turn signal is only supposed to be on (blinking) when you are signaling a turn, do you mean the parking light is out when the headlights are on?

First thing to do is check the parking/turn lamp socket for corrosion and/or mechanical damage to the contacts; if it seems to be OK then you need to check the wiring harness for damage.

Problems as you describe often happen when a ground connection fails and the low wattage lamp that is acting oddly is finding a ground "through" some other higher wattage lamp--but only if the higher watt lamp is off...

southfillyboy2p0

It is only out when the headlight **** is pulled all the way out. Where on the harness would I find the ground connection.

cliffyk

By "it" I assume you mean the parking lamp? You are aware that there are two filaments in that lamp, one for each function (parking and signalling), each driven by separate and unrelated circuits--right?

There are 1/2 dozen or more ground points in the lighting system--check the socket for the conditions listed above first.

Also make 100% sure that the test bulb you used is OK. Verify this by placing it a known good socket and watching it light up. Do this every time you use it--I cannot tell you how many times I have chased, or assisted in the chasing of, fairies by using a "test" lamp/wire/tool that turned out to be bad.