Grounding issue I think

Rozz · Jan 11, 2020

Question ole wise ones, all my lights flicker when the car is running, with the car off and lights on there is no problem. Only when engine is running. Problem is with all lights, headlights, maker lights and the interior lights.

Amy ideas?

Don C · Jan 11, 2020

Voltage regulator or worn brushes or slip rings in the alternator.

It could also be loose connections on the alternator or regulator.

Hemikiller · Jan 12, 2020

Voltage regulator or worn brushes or slip rings in the alternator.

It could also be loose connections on the alternator or regulator.

100% yes to Don's reply.

Check your grounds too.

kcmash · Jan 12, 2020

Not sure what you mean by interior lights too? The dash illumination or something else?

My bet is on a defective headlight switch.

kcmash

Rozz · Jan 12, 2020

Looks like the wiring that goes to the voltage regular has seen its better days, there is no more insulation for about an inch on any of the wires where it plugs into the regulator.

Big Red Mach 1 · Feb 28, 2020

Rozz, Did you find your fix? I have the same issue.

Hemikiller · Feb 29, 2020

Swap to an electronic voltage regulator and clean all grounds. The Standard VR166 is probably the best one at this time. There have been reports that the Motorcraft GR540B is now Chinese made....

Grounding issue I think

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Grounding issue I think

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