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Discussion Starter · #1 ·
This is for a 79 Boxer. My pro

This is for a 79 Boxer. My problem is that the RHS headlight does not raise sometimes. It will always go down. I have switched relays and still have the problem on the RHS. Also, I have verified that I have the same voltages up and down in both the LHS (always works) and RHS by measuring the 4 prong connector. I suspect the problem is in the internal contacts in the motor. The wiring diagram shows that there is a contact system on the cam for the motor that raises and closes the headlights. It has a rubber cover.

I am thinking about pulling the motor/cam apart and seeing if anything needs a little help. Has anybody been here before?

Drew
 
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Discussion Starter · #2 ·
Drew,

I've taken apart


Drew,

I've taken apart the assemblies before, however I would first check the ground wires conditions on both motors, and of course the condition of the wires in the plugs...also replace the relays and make sure the fuses and wires are nice secure & clean on the fuse block. I think in all my years I've only seen 1 or 2 HL motors actually go bad, all all the hundreds of other HL problems were under the catagory - other.

there is a small transistor on the sides of the motors gearbox and I saw one of those go bad once also.

Regards, JRV
 
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Discussion Starter · #3 ·
Thanks JVR. I'm going to

Thanks JVR. I'm going to check the relays, fuses and connector wires again tonight. I appear to have power on each side. That is 13V to the gray wire power switch off/down and 13V to the green/black stripe wire power switch on/up to both sides which leads to suspect something on the motor side.

Ric Rainbolt published a VOM proceedure for checking the diodes in the motor. After carefully doing the above I will check the ground and do the diode test.

Thanks for your help. If I ever can repay it let me know. I really enjoy your site. It has very good usable content.

Regards,

Drew Altemara
 
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Discussion Starter · #4 ·
Drew, I did see something on t

Drew, I did see something on the other site that rang a bell...check that the linkage lowers the motors to exactly BDC & raises to exactly TDC...the arms can be adjusted by loosening the 10mm nut on the side of the motor housing...they have a tendency to come loose and fall out of adjustment that can lead to the problem you describe.

Let us know what you find.

Regards, JRV
 
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Discussion Starter · #5 ·
Thanks JVR. I found my proble

Thanks JVR. I found my problem last night. After swapping relays, checking fuses and connections, verifying power to both sides in the up and down modes I removed the bad motor. I wired it to the LHS, side that works, and it still would not go up. Using a proceedure written by Ric Rainbolt over on the other site I confirmed one of the diodes was bad. So I think that solves my problem. I am going over to Radio Shack later today buy some similar diodes and try my hand at sodering tonight. I think this will get it.

Thanks for all your help. I would post the proceedure for checking the diodes here but I don't want to get in trouble with you or Rob by lifting something that was in the other sites archives and posting it here.

Regards,

Drew
 
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Discussion Starter · #6 ·
I just wanted to follow up. I

I just wanted to follow up. I replaced the diodes last night and installed the motor. That did it. Everything working like a charm.

Drew
 
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Discussion Starter · #7 ·
>>I just wanted to fol

>>I just wanted to follow up. I replaced the diodes last night and installed the motor. That did it. Everything working like a charm. <<

That's Great !!! Thanks for the follow-up.

CONGRATS !!

Gettin down & dirty & showin these Machines Who's Da BOSS, We LUV success stories {
} !!
 
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Discussion Starter · #8 ·
Anyone know where the diode pr

Anyone know where the diode procedure can be downloaded from? I've got a headlamp that winks. Comes up, goes down, comes up a second time and stays.
 
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Discussion Starter · #9 ·
Hi Bill. I sent you a private

Hi Bill. I sent you a private e-mail with Ric's proceedure and some comments from me. There is also a thread on the other site titled Pop Up Headlight Problem.

Drew
 
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Discussion Starter · #10 ·
Well,

308 came in last nig


Well,

308 came in last night with the headlights out of phase..when turned off one stays up, then when turned on they trade places, still one up one down.

Anyone had this problem recently?

Regards, JRV
 
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Discussion Starter · #11 ·
OK, this may be a little diffe

OK, this may be a little different on a 308, can't remember. But it sounds to me like either the linkage rotating around the cam gear is 180 deg off on the light that is up on the "off" position and down on the "on" position or (I believe the 308 may have had contact points outside the motor) or the wiring on the contact points on that light is amiss.
 
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Discussion Starter · #12 ·
Great call on the linkage Drew

Great call on the linkage Drew...you guys are great !!! FIXED...just in time for The Texas Running of the Bulls...{
}

Best Regards, JRV
 
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