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Old 07-06-2020, 07:46 PM   #10
Richard
Senior Member
 
Join Date: Dec 1999
Location: Southern California
Posts: 2,697
Re: LED tail light signals will not flash when lights are on

Doubt it has anything to do with the headlights. The side marker lights are tied into park/turn circuit. When headlight switch is pulled out to park light position is the condition the same? Maybe nothing to with it but on the 72 and maybe 71 the front markers alternate with the turn signal. Think the marker is grounded on the lead to front turn. Hate to think this but I would bench test the led assembly's due to where they came from. Nothing worse than chasing problem that is derived from installing a defective part.
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Richard
1972 K10 Custom Deluxe SWB Fleetside
My build https://67-72chevytrucks.com/vboard/...d.php?t=800746
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