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Hey all on to some hopefully smaller issues that are mostly electrical in nature. So first, my 1972 350 with an auto will start in any gear, I little odd and possibly scary!!! So I figure the NSS needs alignment or has failed, but before I dig into that what is this???
Its right by the fuse box. According to my wiring diagram. it has something to do with the clutch safety switch but is also related to the NSS in a auto. Obviously bypasses by the PO. So as it relates to a auto transmission what belongs here? Is this affecting the function of the NSS?
Thanks!!! Ike
Last edited by general ike; Jun 1, 2018 at 03:34 PM.
The NSS for a manual trans car is close to the fuse block under the dash. The auto trans cars have another pair of wires just like the 2 in your picture, but run down to the shifter in the console. That jumper installed (the little red one) is effectively bypassing the NSS. All you need to do is chase down the problem with the switch in the console and remove that jumper.
Thanks TimAT for the quick response. So just to be clear in a Auto nothing belongs attached to the two (pink) PURPLE leads in the photo? So then the issue does lie with the NSS. Thanks Ike
Last edited by general ike; Jun 1, 2018 at 06:02 PM.
part way down on the first post I show the switch and where the wires (striped and non-striped) go, also that they for whatever reason reverse at the switch pigtails...
TimAT thanks again, Greatly appreciated!!!! Well that was an easy fix. I am not sure why they bypassed the NSS, I simply pulled the jumper and it works fine only starting in park and neutral. I wonder what the advantage in a automatic would there be in bypassing the switch????? I can maybe see it with a manual although I am not sure I would.
TimAT not trying to be a pest but if " On a manual trans car (or auto) the connector not used" why does it exist?? Just trying to better understand how these cars are wired!!
Thanks again greatly appreciate your assistance one more item of the list. Actually two while I was buzzing around I wanted to see why my E brake was not activating the warning light well this will do it!!
P,S: I meant to say purple!!!!Ike
Last edited by general ike; Jun 1, 2018 at 06:01 PM.
Mooser great write up!!! I didn't need to delve in that far but good to know how the switch works!!!! Pics were great and I like the dinosaur comment!!! Ike
" On a manual trans car (or auto) the connector not used" why does it exist?? Just trying to better understand how these cars are wired!!
Just in case what you read did not answer your question.
GM would but BOTH options for a neutral safety switch or clutch safety switch in one harness so when the car was being built...they did not have to have two different harnesses.
Dub thanks so that connector would have been used for a neutral safety switch, correct? Thanks ike
NO...the connector you showed in the photo is for the CLUTCH SFAETY SWITCH. And that is IF the car came with a manual transmission.
AS you wrote...you pulled out this 'jumper wire' and the car works perfectly. Cranks up in PARK and NEURTAL ONLY....and NOT in any drive gear. Am I correct?
Sorry Dub,I meant to say Clutch safety switch and yes the car will only start in park and neutral so it SEEMS to be working correctly.
Now the question is why was it jumped? Personal preference of the former PO? Who knows, but as Bobs77vet has pointed out, I will keep the jumper in the car just in case!!! Thanks for the clarification!!! Ike
Neutral safety switch not working??
