Is there such a relay?
Technical Article Contributor
Joined: Jun 2002
Posts: 10,511
Likes: 10
From: Under the flightpath of old ORD 22R
JMC,
That makes sense, I was not looking at riding the same signal wire with the constant on, and with the reverse lamps.
Good quick way of getting the switch back there.
Never tried hooking 2 different circuits together myself, I know if AC and in Central Office DC ( -48 ) that is a bad thing, never had a case to try it myself in automotive DC to see if it goes boom :d
Phil.
The Radio Shack switch is a SPST switch, but if you use that, and use JMC's diagram, all is good. The only thing being that there is no off for either one. It is on with the reverse lights at a min.
If you want to stick with the ability to turn it off, you are looking at needing a SPDT center off switch. The position of the switch should be labeled as on/off/on. Also a DPDT on/off/on switch will work, but you will have unused contacts on it ( like 2 times as many ).
The Carlington switch like I use on my motorcycle has a DPDT on/off/on switch that is rated 20 amps, and is water proof, but it is like 11.00 a switch for these. 2 indicator lamps, one larger then the other end, to show which side is on.
This is an example of them, but this guy is slow to ship most of the time, and his prices are kind of high. I am sure you can find something local that does the same thing, only non weather resistant.
http://www.electricalconnection.com/...h_high-amp.htm
If you look in the index for the EVTM find Connector C172 or C148 to find circuit #140. This is a Black with a pink stripe wire, in the engine compartment.
The other option is what JMC refered to, to find circuit # 140, with the trailer town reversing lamp relay in the battery junction box ( under the hood ). It seems you would need to run a wire throught the gromet in the firewall to get inside if you are still following my route. If you take JMC, the wire is still needed, but you would mount the relay in the back, and tap the circuit back there to power the reverse lamps.
Need to figure out if the center off position on the switch is that big of a deal, and then decide from there.
Let us know what is up with that decision, as it will make an impact on the amount fo work you need to do.
Steve
That makes sense, I was not looking at riding the same signal wire with the constant on, and with the reverse lamps.
Good quick way of getting the switch back there.
Never tried hooking 2 different circuits together myself, I know if AC and in Central Office DC ( -48 ) that is a bad thing, never had a case to try it myself in automotive DC to see if it goes boom :d
Phil.
The Radio Shack switch is a SPST switch, but if you use that, and use JMC's diagram, all is good. The only thing being that there is no off for either one. It is on with the reverse lights at a min.
If you want to stick with the ability to turn it off, you are looking at needing a SPDT center off switch. The position of the switch should be labeled as on/off/on. Also a DPDT on/off/on switch will work, but you will have unused contacts on it ( like 2 times as many ).
The Carlington switch like I use on my motorcycle has a DPDT on/off/on switch that is rated 20 amps, and is water proof, but it is like 11.00 a switch for these. 2 indicator lamps, one larger then the other end, to show which side is on.
This is an example of them, but this guy is slow to ship most of the time, and his prices are kind of high. I am sure you can find something local that does the same thing, only non weather resistant.
http://www.electricalconnection.com/...h_high-amp.htm
If you look in the index for the EVTM find Connector C172 or C148 to find circuit #140. This is a Black with a pink stripe wire, in the engine compartment.
The other option is what JMC refered to, to find circuit # 140, with the trailer town reversing lamp relay in the battery junction box ( under the hood ). It seems you would need to run a wire throught the gromet in the firewall to get inside if you are still following my route. If you take JMC, the wire is still needed, but you would mount the relay in the back, and tap the circuit back there to power the reverse lamps.
Need to figure out if the center off position on the switch is that big of a deal, and then decide from there.
Let us know what is up with that decision, as it will make an impact on the amount fo work you need to do.
Steve
Thread Starter
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Senior Member
Joined: Sep 2002
Posts: 535
Likes: 0
From: Florida
Well, I found a kick-*** switch to use for this!
At West Marine they have a SPDT Switch thats on/off/on and has DUAL pilot lights (one for each on spot) and you can choose different colors for each pilot light. Very cool and only $13.99. Expensive for a switch, but its perfect for this application.
I havn't bought it yet because I am trying to decide if I want that, or if I want a different SPDT switch they have that has a flip down cover on it. I figure with that, there is no chance of my knee inadvertanly flipping the lights on while driving....
Switch choice will be decided by where I end up putting the switch.
I think I have all I need to get this done with, its just a matter of wiring it all up and deciding where to get all the wires from.
I will keep you all updated.
At West Marine they have a SPDT Switch thats on/off/on and has DUAL pilot lights (one for each on spot) and you can choose different colors for each pilot light. Very cool and only $13.99. Expensive for a switch, but its perfect for this application.
I havn't bought it yet because I am trying to decide if I want that, or if I want a different SPDT switch they have that has a flip down cover on it. I figure with that, there is no chance of my knee inadvertanly flipping the lights on while driving....
Switch choice will be decided by where I end up putting the switch.
I think I have all I need to get this done with, its just a matter of wiring it all up and deciding where to get all the wires from.
I will keep you all updated.