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Topic: Headlight pulsating (flickering) while engine is running (Read 798 times) previous topic - next topic
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Headlight pulsating (flickering) while engine is running

Yahoo Message Number: 113163
Need help on an issue we are having on our 98 Allure,
While the engine is running our headlights dim and brighten. Turn on turn signal or flashers and problem worsens. Volt meter dash guage pulsates along with headlights
Here is a list of things I have tried to fix this problem.
1-Removed all batteries and recharged individually. All batteries charged to full charge, cleaned all battery cables and reinstalled.
2- Removed alternator and took to repair shop and alternator showed good. 14.2 volts and output at 100+ amps for thirty minute under load. Tech said he could rebuild (again) but would not guarantee it would do anything different.
Alternator has always keep batteries charged so starting has not been a problem. Analog guage (dash) and a digital meter (in hand) both show the steady 1 to 1 1/2 volt swing while idling. The dash volt meter can be anywhere from 12-14 volts at highway speed.
3-Tech suggested something about an isolator going bad but don't know where to start.
Any and all suggestions greatly appreciated.
Roy Smith
Country Coach Allure #30195

Re: Headlight pulsating (flickering) while engine is running

Reply #1 –
Yahoo Message Number: 113165
Sounds like a voltage regulator

Gary Glenn
ServiceMaster by A-Town / Hi-Tech
325-665-4993

Re: Headlight pulsating (flickering) while engine is running

Reply #2 –
Yahoo Message Number: 113167
Sounds like a grounding problem, confirm or add a ground to the frame for the instrument or dash cluster.
Robert McClernon
2000 Intrigue

Robert McClernon
2000 Intrigue
40 one slide cummins 375

Re: Headlight pulsating (flickering) while engine is running

Reply #3 –
Yahoo Message Number: 113168
Hi, could be your head lt switch? Charles
 

Re: Headlight pulsating (flickering) while engine is running

Reply #4 –
Yahoo Message Number: 113181
Reinstalled the alternator, cleaned and tighten all connections, snugged up on grounds at body and frame connections and all is good. Voltmeter swing went from 11.75-14.5 volts to a steady 14.25-14.23. Happy camper. Thank everyone.
Roy Cc#30195