Push button start - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**hatzie** · 10-18-2015, 11:25 AM

You're moving the ignition START wire that runs from the column to the neutral safety or clutch interlock switch to your add on button.... on a 1979 this wire is yellow 3 YEL-5 in the wiring diagram (Marked SOL on the switch). The other side of the button needs to be hooked to an ignition switched 12v source.

I'd slip the Packard 56 terminal out of the safety switch and tape over it. Then add a new wire and Packard 56 terminal that reaches the button. That way you can reverse it without too much trouble.

I remember reading about a fellow that used a magnetic switch mounted to the back of the knee panel to interrupt the yellow wire. The start position on the ignition switch start position didn't work without a magnet stuck on the knee panel in the right location.

chrismoore701 · 10-20-2015, 08:14 AM

Quote:

Originally Posted by hatzie

You're moving the ignition START wire that runs from the column to the neutral safety or clutch interlock switch to your add on button.... on a 1979 this wire is yellow 3 YEL-5 in the wiring diagram (Marked SOL on the switch). The other side of the button needs to be hooked to an ignition switched 12v source.

I'd slip the Packard 56 terminal out of the safety switch and tape over it. Then add a new wire and Packard 56 terminal that reaches the button. That way you can reverse it without too much trouble.

I remember reading about a fellow that used a magnetic switch mounted to the back of the knee panel to interrupt the yellow wire. The start position on the ignition switch start position didn't work without a magnet stuck on the knee panel in the right location.

If I understand this correctly, the yellow 3 YEL-5 in the wiring diagram (Marked SOL on the switch). will only get power when I turn the key to start correct? So I can not run from this tab to my push button, I need 12V switch power correct? Thanks, took a little bit, but I think I understand now. I am dangerous around schematics

10-18-2015, 11:25 AM	#1
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 5,022	Re: Push button start You're moving the ignition START wire that runs from the column to the neutral safety or clutch interlock switch to your add on button.... on a 1979 this wire is yellow 3 YEL-5 in the wiring diagram (Marked SOL on the switch). The other side of the button needs to be hooked to an ignition switched 12v source. I'd slip the Packard 56 terminal out of the safety switch and tape over it. Then add a new wire and Packard 56 terminal that reaches the button. That way you can reverse it without too much trouble. I remember reading about a fellow that used a magnetic switch mounted to the back of the knee panel to interrupt the yellow wire. The start position on the ignition switch start position didn't work without a magnet stuck on the knee panel in the right location. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.



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