Question about 1992 Mercury Grand Marquis
Ok, when you turn on the head lights the dash lights get dim.But if you turn off the dash light does the dash light gets bright again or it remains dim.------ If the dash light becomes bright as you turn off the head lights then its a short in between dash lights wirings and headlight wirings.There is a confirm short.rte check the head light switch wirings and dash light wirings.Any of the wirings is getting in contact with metal part or ground wire is getting loose or its getting connected to any other live wire.
Also check the battery voltage.And battery to alternator wiring and connections.Get the battery and alternator voltage checked separately.---------If the battery or alternator voltage is low then, this low voltage can be the issue.Also check the dimmer switch.Remove and reconnect dimmer switch.
Check out this possibilities.This should help.Thanks.Helpmech.
Posted on Mar 21, 2011
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Posted on Jan 02, 2017
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