Ignition Switch Wiring ?
Thread Starter
|
Senior User
Joined: Apr 2002
Posts: 119
Likes: 0
From: New Hampshire USA
Ignition Switch Wiring ?
What is the definition/purpose of the Prove Out terminals on a 78 ignition switch?
I have a chilton manual with the wiring diagram but the switch wires aren't labeled so I don't know which color goes to which terminal.
I understand the batt terminals, the starter terminal, and accessory 1 terminal. I figure that the wire runing to the module is one of the ignition terminals, and that the one going to the coil/starter relay/EGR is the other ignition, and the other one to the fuse box should be accessory 2, but the purple/white to the brake low lamp confuses me and again what is a prove out? Is that where the Purple/white goes?
I have a chilton manual with the wiring diagram but the switch wires aren't labeled so I don't know which color goes to which terminal.
I understand the batt terminals, the starter terminal, and accessory 1 terminal. I figure that the wire runing to the module is one of the ignition terminals, and that the one going to the coil/starter relay/EGR is the other ignition, and the other one to the fuse box should be accessory 2, but the purple/white to the brake low lamp confuses me and again what is a prove out? Is that where the Purple/white goes?
Thread Starter
|
Senior User
Joined: Apr 2002
Posts: 119
Likes: 0
From: New Hampshire USA
Ignition Switch Wiring ?
That was one of the scenarios I came to for the Phase Out, thank you for providing the proof positive.
I got more concerned after reading a earlier post about a burnt out purple/white wire and was concerned I'd smoke the whole harness if I didn't verify, so I take it the phase out to the brake low switch is to check the light and the brake portioning valve is operated from another part of the switch?
Mil1ion thank you for the diagram, I will archive it for my truck, though I was asking about a 78 for my buddies bronco but the purple/white are the same according to my other diagram and the rest makes sense to me, unless there are enough wires for all 9 terminals on his switch. (2) Batt, (2) Ign, (2) Phase Out, (2) Acc., (1) Starter.
Funniest thing about this whole thing is my truck is gonna require so much more than one diagram cause it has a 71 460 in it with 71 ignition system and none of the emissions controls at least as far as I can tell. Knew I was in for trouble when the 86 diagram showed EEC and other things I don't have, but I do have a bunch of unconnected terminals and wires...LOL.
So I will begin filling the shelves with Haynes and where do I found Helm manuals.
I got more concerned after reading a earlier post about a burnt out purple/white wire and was concerned I'd smoke the whole harness if I didn't verify, so I take it the phase out to the brake low switch is to check the light and the brake portioning valve is operated from another part of the switch?
Mil1ion thank you for the diagram, I will archive it for my truck, though I was asking about a 78 for my buddies bronco but the purple/white are the same according to my other diagram and the rest makes sense to me, unless there are enough wires for all 9 terminals on his switch. (2) Batt, (2) Ign, (2) Phase Out, (2) Acc., (1) Starter.
Funniest thing about this whole thing is my truck is gonna require so much more than one diagram cause it has a 71 460 in it with 71 ignition system and none of the emissions controls at least as far as I can tell. Knew I was in for trouble when the 86 diagram showed EEC and other things I don't have, but I do have a bunch of unconnected terminals and wires...LOL.
So I will begin filling the shelves with Haynes and where do I found Helm manuals.
Thread
Thread Starter
Forum
Replies
Last Post
Marine5811
1987 - 1996 F150 & Larger F-Series Trucks
24
Apr 23, 2018 03:23 PM
Ford77Pickup
1973 - 1979 F-100 & Larger F-Series Trucks
22
Feb 26, 2017 07:36 PM
mgerdau
1948 - 1956 F1, F100 & Larger F-Series Trucks
6
May 28, 2016 11:17 PM
Murphy's Law F-150
1973 - 1979 F-100 & Larger F-Series Trucks
10
Mar 16, 2016 01:16 PM
