Power for Reverse Lights

[money pit]

I had problems with the engine starting in park and neutral. I replaced the NSS with an NOS switch (after trying 2 after market units). I also replaced the wiring harness to the NSS. I checked for power at the firewall, with the car in reverse and the engine on. There's no power at the firewall. The fuse is good. I checked the harness. There's continuity on the wire that goes to the NSS when the trans in reverse and no continuity when in other gears. Is there supposed to be power at all times at the firewall for the reverse lights and the care is in reverse when the power is on?

 

[ted s]

the 2 outer pins are for reverse lights. one wire s/b hot when key is on

 

[Challenger RTA]

 

[Chryco Psycho]

Yes power should always be at the switch , the switch closes to connect the circuit out to the taillights

 

[money pit]

the 2 outer pins are for reverse lights. one wire s/b hot when key is on

The problem I have, there isn't power at the firewall, to power the harness. The engine starts fine but no power to the NSS for the back up lights. Thanks

 

[Chryco Psycho]

so you need to trace back the circuit to the source .

 

[Challenger RTA]

Start at fuse box very short circuit run. diagrams are different but the same with very little differences. I'm going to guess it's the bulkhead connector.Don't just touch tester to connector.scrape or clean for good connection. Also had a freaky fuse incident on someones car. pulled fuse turned upside down checked good. installed no power.found by probing wires.person was told needed computer and other stuff.$1000 later.

 

[Chryco Psycho]

Glass fuses can look good & test bad also .

 

[money pit]

Start at fuse box very short circuit run. diagrams are different but the same with very little differences. I'm going to guess it's the bulkhead connector.Don't just touch tester to connector.scrape or clean for good connection. Also had a freaky fuse incident on someones car. pulled fuse turned upside down checked good. installed no power.found by probing wires.person was told needed computer and other stuff.$1000 later.

That's what I did. I checked the fuse it look ok but it was blown. The fuse box was loose from the bulkhead and caused a short. Thanks

Start at fuse box very short circuit run. diagrams are different but the same with very little differences. I'm going to guess it's the bulkhead connector.Don't just touch tester to connector.scrape or clean for good connection. Also had a freaky fuse incident on someones car. pulled fuse turned upside down checked good. installed no power.found by probing wires.person was told needed computer and other stuff.$1000 later.

 

[money pit]

Glass fuses can look good & test bad also .

You are right. The fuse looked good but was blown.

 

[Chryco Psycho]

I have seen them disconnect in the end cap .
glad you found the problem !