Ace 100B Rear tailight

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SuperRat2110
Posts: 182
Joined: Sun Jul 02, 2017 7:52 am

Ace 100B Rear tailight

Post by SuperRat2110 »

Hi guys, long time since I've used the forum for help. Hoping to get some direction on the Ace 100B. The rear tailight works, as in it lights up when running but does nothing when applying rear brake. The switch works, meaning I have continuity between the two poles when pulling on the switch. Any help would be appreciated.

Shaun
viclioce
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Location: Santa Fe, NM
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Re: Ace 100B Rear tailight

Post by viclioce »

How do you know the switch works? When you pull it manually, then the brake light lights up? Or are you saying the switch can be pulled & therefore it’s functional? Being able to manipulate the switch doesn’t necessarily mean the switch is good. Tell us more… :ugeek: Victor

1978 175SL
1976 03 Wombat
1975 99 Road Toad (2)
1973 96 Dirt Squirt (2)
1973 “Wombat Combat”
1973 Combat Wombat
1972 94 Wombat (2)
1972 Super Squirt
1971 92B+ Ace
1970 92B Ace 100B (2)
1968 92 Ace 100
1966 Ace 90
; D Victor
SuperRat2110
Posts: 182
Joined: Sun Jul 02, 2017 7:52 am

Re: Ace 100B Rear tailight

Post by SuperRat2110 »

Victor, as I mentioned, when I pull on the spring loaded switch, I used my meter to test for continuity between the two leads coming off of it. When I pull it the two make contact. If that's how it supposed to work.

Shaun
captonzap
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Joined: Mon Apr 05, 2021 4:50 am

Re: Ace 100B Rear tailight

Post by captonzap »

Get a volt meter, and make sure it works. Fasten the negative lead to the frame, or battery negative terminal.
Turn on the key, and see if you get a volt reading on either side of the rear brake switch, using the positive meter lead.
No, check the wiring between the key switch and the brake switch.
Yes, apply the brake and see if you get voltage at the terminal on the other side of the brake switch.
No, the switch is bad.
Yes, take the bulb out of the socket of the tail light, and see if one of the terminals in the socket has voltage, with the switch closed. (Brake applied)
No, check the wire between the brake switch and the tail light socket for continuity or short circuit from bare wire.
Yes, check the brake filament of the bulb.
Same procedure for the front brake switch.

CZ
taber hodaka
Posts: 2240
Joined: Mon Jul 29, 2013 6:34 pm

Re: Ace 100B Rear tailight

Post by taber hodaka »

Are you getting electricity to the switch and is there electricity at the taillight from the switch? I think the taillight has a bulb with two filaments one for taillight and one for brake light. --------------- Clarence
SuperRat2110
Posts: 182
Joined: Sun Jul 02, 2017 7:52 am

Re: Ace 100B Rear tailight

Post by SuperRat2110 »

Hey guys, thanks for all the help. Ended up being the bulb. It looked good, but when I flipped it around the brake light worked but taillight didn't. New bulb should do the trick. Thanks again.
dirty_rat
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Joined: Mon Jul 22, 2013 10:39 am
Location: Spring Hill, FL

Re: Ace 100B Rear tailight

Post by dirty_rat »

Sometimes its the simple things!!!
SuperRat2110
Posts: 182
Joined: Sun Jul 02, 2017 7:52 am

Re: Ace 100B Rear tailight

Post by SuperRat2110 »

Dirty, I know right. I still think the switch wasn't working right prior to that on the rear brake because I had no continuity between the leads when I pulled on it. I drilled out the rivets and took it apart. Cleaned up the corrosion on the inside and it seemed to fix that problem but obviously wasn't going to help the bad bulb. Lol. Just glad it's working the way it should now.
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