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| | | | Joined: Aug 2018 Posts: 56 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2018 Posts: 56 | Hi all,
Been wiring up my 1951 3100 5-window, Mabel. Brake lights, tail lights, turn signals, all working. However, wanting to share the bulb for brake lights and turn signals, I've come across an issue. Since both the wires for brake lights and turn signals share a common wire, the brake light wire, I figure I need a diode in each brake light wire to prevent the turn signal from backfeeding to the other side. Is my thinking correct? And, if so, what diode do I buy and where from? It's not like I can stop in at a local radio shack anymore. | | | | | Joined: Aug 2011 Posts: 228 'Bolter | | 'Bolter Joined: Aug 2011 Posts: 228 | Unless you are wiring a separate third brakelight, no diodes are needed. There will be a separate feed for the indicators if used, one wire for left and one for right from the flasher. You will need a dual filament, socket and bulb because one wire is tail light and the other brake/flasher. Amazon has a 12 volt HD diode that you can use when doing the third brake light.Easy connect, two inputs one output! | | | | | Joined: Aug 2018 Posts: 56 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2018 Posts: 56 | https://www.ebay.com/itm/DIODE-ASSEMBLY-PAINLESS-WIRING/231337063377?epid=1717863983&hash=item35dcc373d1:g:9CcAAOSwUb5bmMdR&vxp=mtr
I saw this Painless Wiring diode, but it seems a bit pricey at $15 for what is a basic electronic component. | | | | | Joined: Aug 2018 Posts: 56 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2018 Posts: 56 | Unless you are wiring a separate third brakelight, no diodes are needed. There will be a separate feed for the indicators if used, one wire for left and one for right from the flasher. You will need a dual filament, socket and bulb because one wire is tail light and the other brake/flasher. Amazon has a 12 volt HD diode that you can use when doing the third brake light.Easy connect, two inputs one output! OK, I agree with you, and with my dual filament bulb, one IS tail light and one IS brake/flasher. Except, the brake/flasher has two wires, a brake wire and a turn signal wire. Maybe I just need to disconnect the brake wiring and see if the brake signal travels to the turn signal lines. I just wired up a new turn signal unit, it's the chrome style that attaches to the steering column with a hose clamp and has an indicator at the end of the stalk. I suppose it's the cheapest way to cut the brake wire and see if it runs through the turn signal wire. | | | | | Joined: Aug 2018 Posts: 56 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2018 Posts: 56 | That was it!! I just cut the "brake light wire" to the turn signals. I guess the original intention for that particular wire was a third brake light. It was shorter than the other wires that go to the rear. At first I didn't have brake lights and I figured I needed to have this wire go to the rear. Sure enough, I had brake lights when I did this, but it was before I wired the turn signal stalk and didn't realize I didn't need it. Whew! | | |
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