Originally Posted By Just-a-dart

If I wanted to do that I would use a 1pole double throw relay (spdt) with the reverse lights activating it.


I don't see the need for a relay. The BU light circuit of the 3-prong NSS acts a Normally Open switch so, hooking it from battery power directly to the solenoid would only power the solenoid from that circuit when the shifter is in Reverse.

Having the button and the NSS connected to the solenoid in parallel won't cause any feedback problems unless the button is pressed when in Reverse.

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