Park/Neutral Switch

[ChickenRammit]

hey, does anybody know if the old non-computerized chevys had a P/N switch? my truck is a '74.

i need to locate it or add one in so that i can properly wire in the ECM on my TBI swap.

 

[BoondocK5]

Up under the dash on the topside of the steering column, mine had a purple wire and a yellow wire plugged into it. 89 wiring harness. I just spade connected them, that way I can use it as a valet switch too.

 

[ChickenRammit]

what year is your rig? are you talking about the wire harness that looks kind of like this:

http://www.napaonline.com/Search/Mu...505_0164225105&An=599001+101974+50014+2014036

what do you mean by valet switch?

 

[BigBen]

My '74 had one as Boondock describes.
Top of the column at the firewall. Somewhat semi-circular looking.

(Napa link only goes to Napa homepage)

-Ben

 

[BoondocK5]

what year is your rig? are you talking about the wire harness that looks kind of like this:

http://www.napaonline.com/Search/Mu...505_0164225105&An=599001+101974+50014+2014036

what do you mean by valet switch?

The harness was out of an 89 Burb that I made into a more functional, use-able harness.( eliminating the AC, the power windows, ect.) I didn't change the N/S switch stuff though. I just didn't use a N/S switch because it was going to be for a Manual trans.
If you don't make the connection of the two wires, the connection between the ignition switch and the starter cannot be made. hence valet switch! If I wanted to make it not start-able, I just pull the spade connectors apart, to start it just reconnect the spade connectors and start like normal.

 

[ChickenRammit]

cool. i found the switch you're talking about. it has a purple wire going in from the ignition switch and then to the starter. that must be the neutral safety switch.

on the same switch there is also a plug with a green wire and a light green wire. do you guys have any idea what that circuit might be for?


the reason i ask is because isn't there a difference between a Neutral Safety switch, and a Park/Neutral switch?

 

[bp71k5]

The green wires are probably for the reverse lights.

 

[kgblazerfive]

cool. i found the switch you're talking about. it has a purple wire going in from the ignition switch and then to the starter. that must be the neutral safety switch.

on the same switch there is also a plug with a green wire and a light green wire. do you guys have any idea what that circuit might be for?


the reason i ask is because isn't there a difference between a Neutral Safety switch, and a Park/Neutral switch?

Both the same will only let the vehicle start in park or neutral

 

[JDNobodi]

The green wires are probably for the reverse lights.

Yes it is. The lighter green is the wire that goes to the lights.
On my early harnesses I have, the wire that comes out of the ignition switch to the N/P safety switch is purple with a white strip. It seems GM turned this wire to a yellow wire during the mid to late seventies. Probably to save money.
The wire after the N/P safety switch going to the starter is plain purple for all years.