Truck wont start - HELP - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1969Chev · 02-09-2014, 07:07 PM

I have a 69 c20. My dad had purchased it about 18 years ago and it had a push button in it. The wiring to this truck under the dash is kinda iffy. His wiring buddy took it out and made the regular key work again. Last year that had stopped working for some reason so i had put another push button back in to bypass the ignition. I had done it by splicing into the purple wire on the wiring harness on the engine side of the firewall, and running that to one side of the button, and the other side of the button went straight to the battery. now that isnt working as of this morning. I cleaned up all my connections, cleaned up the wire that goes from the positive terminal on the battery to the fender, cleaned that whole thing that that wire goes to. And i even maybe thought the push button went bad so i undid those wires and turned the key and touched them together and nothing. So i dont know what now. I can jump the starter and it fires up, but it wont fire up from the ignition or button. what should i do?

Wootdog · 02-09-2014, 07:45 PM

Make it stock again. Most people will not jump in when some one has a jerry rig setup.
Kerry

Longhorn 70 · 02-09-2014, 07:47 PM

I don't know what you "should do" but what I would do is track down the purple wire that goes from the ignition switch to the solenoid. I have attached a wiring diagram that may help.

If the truck still has the Neutral Safety Switch in place it could be an issue.

Thing I would check are...

neutral safety switch
wire from ignition switch to firewall, 12 ga. Purple
Wire from the external fuse block connector to the solenoid. 12 ga. Purple
Just make sure they will light a test light when they are supposed to. If you use a volt meter, you may get 12 volts but not enough current. Use a test light.

Make sure you have a good ground to the engine as well.

Sean1985 · 02-09-2014, 07:47 PM

Sounds like you might have a broken wire somewhere. You can check that wire with a ohm meter if you have one. Or temporarily hook up your push button under the hood with some new temporary wires and check that it turns over. Then you know you have a broken wire.

1969Chev · 02-09-2014, 07:52 PM

Thank you guys. i will go tinker with it some more

02-09-2014, 07:07 PM	#1
1969Chev Registered User Join Date: Jul 2012 Location: McMinnville, OR Posts: 80	Truck wont start - HELP I have a 69 c20. My dad had purchased it about 18 years ago and it had a push button in it. The wiring to this truck under the dash is kinda iffy. His wiring buddy took it out and made the regular key work again. Last year that had stopped working for some reason so i had put another push button back in to bypass the ignition. I had done it by splicing into the purple wire on the wiring harness on the engine side of the firewall, and running that to one side of the button, and the other side of the button went straight to the battery. now that isnt working as of this morning. I cleaned up all my connections, cleaned up the wire that goes from the positive terminal on the battery to the fender, cleaned that whole thing that that wire goes to. And i even maybe thought the push button went bad so i undid those wires and turned the key and touched them together and nothing. So i dont know what now. I can jump the starter and it fires up, but it wont fire up from the ignition or button. what should i do? __________________ 1969 CST/20 396/TH400 Tach Posi

02-09-2014, 07:45 PM	#2
Wootdog Senior Member Join Date: Jan 2001 Location: Virginia Beach, Va, USA Posts: 1,684	Re: Truck wont start - HELP Make it stock again. Most people will not jump in when some one has a jerry rig setup. Kerry __________________ 1967 C10 Got it back after three years Boy I sure missed Peppy 1969 Chevelle 1990 IROC Z Convertible 2002 Silverado LT

02-09-2014, 07:47 PM	#3
Longhorn 70 Registered User Join Date: Dec 2012 Location: Chandler AZ Posts: 1,149	Re: Truck wont start - HELP I don't know what you "should do" but what I would do is track down the purple wire that goes from the ignition switch to the solenoid. I have attached a wiring diagram that may help. If the truck still has the Neutral Safety Switch in place it could be an issue. Thing I would check are... neutral safety switch wire from ignition switch to firewall, 12 ga. Purple Wire from the external fuse block connector to the solenoid. 12 ga. Purple Just make sure they will light a test light when they are supposed to. If you use a volt meter, you may get 12 volts but not enough current. Use a test light. Make sure you have a good ground to the engine as well. Attached Images __________________ 1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9

02-09-2014, 07:47 PM	#4
Sean1985 Registered User Join Date: Dec 2013 Location: Carlsbad Posts: 133	Re: Truck wont start - HELP Sounds like you might have a broken wire somewhere. You can check that wire with a ohm meter if you have one. Or temporarily hook up your push button under the hood with some new temporary wires and check that it turns over. Then you know you have a broken wire.

02-09-2014, 07:52 PM	#5
1969Chev Registered User Join Date: Jul 2012 Location: McMinnville, OR Posts: 80	Re: Truck wont start - HELP Thank you guys. i will go tinker with it some more __________________ 1969 CST/20 396/TH400 Tach Posi



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