Electrical Issues

[markbob]

Hello,

had radio converted to AM/FM/AUX.....put in new speaker and radio yesterday....

today, I tried to chase down the reason why my inside right tail light is not working properly.....I switched bulbs with the outside right light, and it's not a bulb issue...it's in the socket....

in checking everything out, I attempted to check my voltage at the socket....I must have grounded it out, and I blew a fuse.
I replaced it and everything reverted to as it was.
I noticed my back up lights were not working, so I tried to check the bulb and such....I ended up taking left tail light housing out so I could replace the bulb. When I powered up the car, I would blow the tail light fuse....I went through several fuses, and now the back up lights and the brake lights do not work....

Any ideas? I checked the NSS connection at the transmission, and there was a bit of tranny oil on it....so I cleaned it up and reseated it....no change to back up lights.

Not sure what is going on with brake lights....

any thoughts?

thanks,

Mark

 

[62 Dart Convertible]

If it's blowing a fuse but wasn't before, then you now have a short circuit to ground, and it's most likely to be in something you touched. You are looking for damaged insulation or a bulb contact that is grounded. There's no magic answer, you just have to keep looking and testing...

 

[HT413]

In these cars, reverse lights are powered through the radio connector. I wonder if you may have knocked something loose in the connector?

 

[markbob]

Thx for replies
I found another fuse blown and now the flashers and brake lights are
working
last night the reverse lights worked intermittently
not sure what happened but now this am, they r not working again
the radio works fine and I dont believe the power is the issue
does the switch that activates the lights come thru the nss or is it in the column?
Thx
Mark

 

[HT413]

What year / model car is it?

 

[markbob]

69 coronet 2 door hardtop 318 auto

 

[HT413]

Assuming it's a 69 trans (and i believe both the 727 and 904 are the same in this regard), it should have a 3 pronged nss on the transmission. The center prong goes to the sterter relay (that's the nss part of its job) and the 2 outer prongs are the reverse light circuit. Here's the other sheet for the wiring diagram (i know its plymouth but dodge should be same in this regard).

Follow the power from the reverse lights- violet comes from the back up lights, through position 4 on the rear wiring connector then comes through the bulkhead connector at positon C. Then goes to the outer prong on the nss. When the trans is in reverse, it makes connection between the two outer prongs, so the violet is now connected to the other violet on the other outer prong. The other violet goes through the bulkhead position D becomes the white wire behind the dash, connects to the radio connector and then goes to the fuse box.

I just traced that in reverse direction of current flow of course, but i would look at the nss first, put the trans in reverse (not running is fine) then check for continuity. if that checks ok, the nss is fine. then probably check the radio connector for good connections since you just intalled the new radio. The reverse lights for plymouth (i think for dodge too but check that) get their ground through the bumper, so it can only be the power circuit that is the issue.

- - - Updated - - -

 

[markbob]

I checked for continuity on the nss and have none
must b a bad switch huh?

 

[HT413]

Yup, if it was in reverse it should have continutity. Looks like a simple fix!

 

[markbob]

Hey guys....

switched out my NSS with a new one.....

first thing....fluid poured out of the tranny.....I would say I had it overserviced just a bit....

checked again and still no continuity on switch.....

not sure if the oil level in tranny has anything to do with it....the first one was soaked with oil....and actually had some coming through on outside of unit by the 3 prongs....

any thoughts?

what is on the inside that actually makes contact with the NSS?

thanks,

Mark

 

[HT413]

I am in no way a tranny guy, but the factory service manual says some fluid should pour out when removing the nss. It also says with the nss out, you should check that the lever inside the tranny is centered on the pin on the nss. But it doesnt say what to do if it isn't. :dontknow:

I wonder if you just happened to get another bad switch? Happens all the time. I once got 2 bad rear wheel cylinders in a row.

 

[markbob]

Hey guys

got under car the other day and found the culprit was the NSS
the one I has was just a bit too long and when screwed into the tranny housing it caused my issue

go figure