Wiring

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STRUTYOURSTUFF
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Wiring

#1

Post by STRUTYOURSTUFF » Sat Jan 12, 2019 6:28 pm

Ok I am trying to use this basic wiring diagram to wire my 60 pan. I have checked this over and over. Still same result. My taillight bulb stays on using both filaments. Basically my brake light is on. I have disconnected both wires to the brake light switch and it still stays on. Any advice? Thanks brothers.
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Re: Wiring

#2

Post by drinner-okc » Sat Jan 12, 2019 7:04 pm

make sure your tail light assembly has a good ground. light to fender & fender to frame. your running lamp might be using the brake light circuit for ground. to test, just make a jumper wire from the lamp to where the battery grounds.

1950Panhead
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Re: Wiring

#3

Post by 1950Panhead » Sat Jan 12, 2019 7:11 pm

http://www.hydra-glide.com/joomla/index ... -1955-1957
Green wire from ignition switch, through junction box to tail light (hot when lights switch on)
Red wire from brake switch, through junction box to stop light (hot when step on brakes)

Disconnect red wire from brake switch.
If both lights are on there is a connection between green and red wires in junction box or in cable guide in rear fender or at tail light connections.

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Re: Wiring

#4

Post by Excalibur » Sat Jan 12, 2019 9:50 pm

Often such crazy problems turn out to be a poor ground of the bulb or bulb holder. To isolate the possibility, run a temporary ground wire as suggested upthread. Good luck, hope this helps.

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Re: Wiring

#5

Post by RUBONE » Sat Jan 12, 2019 10:05 pm

Be sure to check the taillight socket closely if it is an aftermarket light.

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Re: Wiring

#6

Post by Buddhahoodvatoloco » Sat Jan 12, 2019 10:08 pm

Ah, the taillamp Gremlin, as has been stated, "Ground" is usually the suspect, but if its a repop lamp, review it careful as was postured.
Good luck.

STRUTYOURSTUFF
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Re: Wiring

#7

Post by STRUTYOURSTUFF » Sat Jan 12, 2019 10:56 pm

Thanks guys for the info. I made a jumper wire tried that no luck. I detached the socket holder from the tail light assembly than the light goes off. ?

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Re: Wiring

#8

Post by awander » Sat Jan 12, 2019 11:33 pm

OK, when you detached the socket from the taillight assembly, and the light went off, you disconnected the ground.

With the bulb out, and the socket still detached, and the ignition switch OFF, what voltage do you measure on the contacts in the socket? Measure from each contact to ground.

Make the same measurements with the ignition switch in the "Ignition" position.

Finally, measure again with the switch in the "ignition and Lights" position.

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Re: Wiring

#9

Post by Excalibur » Sun Jan 13, 2019 7:02 am

Does applying the rear brake make both filaments glow? (Socket needs to be grounded for test).
If yes, it could be tail and brake wires are joined somewhere upstream. Has the tire rubbed wires bare under fender? or do the wires share a common connector some place?

I suggest put some pics and save a ton of assumptions...

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Re: Wiring

#10

Post by george48pan » Sun Jan 13, 2019 5:48 pm

STRUTYOURSTUFF wrote:
Sat Jan 12, 2019 6:28 pm
Ok I am trying to use this basic wiring diagram to wire my 60 pan. I have checked this over and over. Still same result. My taillight bulb stays on using both filaments. Basically my brake light is on. I have disconnected both wires to the brake light switch and it still stays on. Any advice? Thanks brothers.
After removing wires from the terminals, check your ignition switch with an ohmmeter to ensure the correct switch operation and identify the correct terminals for wire connections. Then check your brake switch with the ohmmeter. Next reconnect the battery wire to the correct terminal and measure the voltages at the switch terminals. Reconnect the wires one at a time and verify results. Eventually you will resolve your problem.

STRUTYOURSTUFF
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Re: Wiring

#11

Post by STRUTYOURSTUFF » Sun Jan 13, 2019 6:24 pm

Hey guys thanks for all the info. I took the fender off this morning. Checked the wires, ran a separate ground put all back and voila working like a champ. Funny thing don’t need the new ground wire to make it work. But guess what it’s F ing staying. Thanks again, Wheels

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Re: Wiring

#12

Post by Lowbikemike » Sun Jan 13, 2019 10:07 pm

If both filaments were illuminated at all times, your two tail light wires were most likely shorted together somewhere in the fender loom. Moving the wiring around probably "fixed' the shorted wires....for a while anyway.

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Re: Wiring

#13

Post by RUBONE » Sun Jan 13, 2019 10:28 pm

If the fender was insulated by paint and is no longer then that was your issue. If there is no ground it will run through the other filament to get to one!
Good going. Now on to the next step!

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Re: Wiring

#14

Post by awander » Sun Jan 13, 2019 10:59 pm

RUBONE wrote:
Sun Jan 13, 2019 10:28 pm
If the fender was insulated by paint and is no longer then that was your issue. If there is no ground it will run through the other filament to get to one!
Good going. Now on to the next step!
Hmmm-I see that this is theoretically possible, but:

-The way these wires should be working is:
--taillight wire (hot only when ignition switch is in lighting position, and disconnected when it is not)
--brake light wire (hot only when the brake switch is closed, and disconnected when it is not)

How would a ground get onto either the taillight or the brake light wire, unless something was wrong with the wiring?

I suspect that one of the wires(probably the brake light wire) was pinched somewhere, grounding it, and causing both filaments to light when the ignition switch was in the lights position.

The OP hasn't really gives us enough info to really tell, though...

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Re: Wiring

#15

Post by Buddhahoodvatoloco » Mon Jan 14, 2019 4:48 am

awander wrote:
Sun Jan 13, 2019 10:59 pm
RUBONE wrote:
Sun Jan 13, 2019 10:28 pm
If the fender was insulated by paint and is no longer then that was your issue. If there is no ground it will run through the other filament to get to one!
Good going. Now on to the next step!
Hmmm-I see that this is theoretically possible, but:

-The way these wires should be working is:
--taillight wire (hot only when ignition switch is in lighting position, and disconnected when it is not) Not exactly correct, but then who's a expert.
--brake light wire (hot only when the brake switch is closed, and disconnected when it is not)

How would a ground get onto either the taillight or the brake light wire, unless something was wrong with the wiring?

I suspect that one of the wires(probably the brake light wire) was pinched somewhere, grounding it, and causing both filaments to light when the ignition switch was in the lights position.

The OP hasn't really gives us enough info to really tell, though...

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