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Headlight issues

Old Nov 26, 2017 | 12:20 PM
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Default Headlight issues

I have a set of radio flyer HID headlights with led hi beam with the on all four harness. They are behaving very strangely. They will both cycle up properly when you turned them on but only one of of them will go done when you turned them off. They will alternate side when you turn them on and off. One cycle the left side with stay up and another cycle that right side will stay up when you try to power them off. Any ideas? The headlight bumpers look good.
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Old Nov 27, 2017 | 12:08 AM
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Old Nov 27, 2017 | 07:42 AM
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Originally Posted by Caveboy
Ttt
I always start with the easiest first...Pull the negative terminal off your battery....its a simple reset. Five minutes later, reconnect.

Second, check your bump stops...four on each headlight bucket.

The above is worth a try...for starters.

I have the same set-up. LED's and the hi-four harness.
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Old Nov 28, 2017 | 09:58 AM
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Old Nov 28, 2017 | 12:00 PM
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Originally Posted by Caveboy
...They will both cycle up properly when you turned them on, but only one of of them will go down when you turned them off. They will alternate side when you turn them on and off...
This is very peculiar and it would be interesting to see if the Headlamp Opening Door Actuator Control Module (DACM) command signals are following the right sequence. That would be a good starting point in the troubleshooting process. You will need a multimeter. Check what's happening and report back.




Power Sequence
BAT voltage is constant to Headlamp Opening Door Actuator Control Module (DACM) from the HDLP MOT L MiniFuse #4 (CKT 2940) and from the HDLP MOT R MiniFuse #3 (CKT 3040).

Headlamp Switch to HEAD position:
  • BAT voltage is applied to Headlamp ON Input on DACM via CKT 103.
  • LH door opens with BAT VOLT to LH opening door assy via CKT 576 & GND is applied to CKT 577.
  • RH door opens with BAT VOLT to RH opening door assy via CKT 578 & GND is applied to CKT 579.

When HL switch is OFF:
  • BAT voltage is applied to Headlamp OFF Input on DACM via CKT 306.
  • LH door closes with BAT VOLT to LH opening door assy via CKT 577 & GND is applied to CKT 576.
  • RH door closes with BAT VOLT to RH opening door assy via CKT 579 & GND is applied to CKT 578.

The Headlamp Opening DACM (front RH side below RH HL Assy) is grounded by CKT 150 via Splice Pack#100 (forwardlamp harness, attached to G102 - Point #8 in diagram below).

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