signal light problems

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Keith Bradley

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Went using signal lights rear works as it should but my problems is with the front. Both signals and front markers flash at the same time. All the grounds on the header panel look good. Any ideas Thanks Keith
 

chengny

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Went using signal lights rear works as it should but my problems is with the front. Both signals and front markers flash at the same time. All the grounds on the header panel look good. Any ideas Thanks Keith


New or existing problem? Any repairs/modifications immediately prior to start of issue?

Be sure all 4 bulbs are the correct ones (1157 park/turn & 168 marker) - and their sockets are clean. Inspect wiring to park/turn signals (BRN - park) & (LT BLU/DK BLU - L&R directionals), look for any obviously damaged insulation or shorts.
 

Keith Bradley

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I bought the truck and the signal light switch was broke ,so that was replaced. Don,t know if signal lights worked when I gut the truck. Bulbs are all correct and the sockets are clean
 

C10MixMaster

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grounds can look good and be deceiving. Use a test light or volt meter, clip to ground and the probe touch it to the base of the bulb, if it lights you have a bad ground , if it doesn't then the ground is good.
 

Craig 85

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The turn signal and front side marker are supposed to flash at the same time until the parking lights/headlights come on. They then alternate.

EDIT: Sorry I missed that both were flashing.
 

chengny

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350/5.7
The turn signal and front side marker are supposed to flash at the same time until the parking lights/headlights come on. They then alternate.

EDIT: Sorry I missed that both were flashing.


Craig,

If I am reading this right:

Both signals and front markers flash at the same time.

When he says "both", I think he's referring to both the LH and RH sides (blinkers & markers combined). IOW, if the directionals are activated - in either direction - and the HL's/PL's are off, from the front it looks like the emergency flashers are on.
 

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