Not starting, new battery, new ignition switch... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

zodari · 01-23-2015, 03:23 AM

New to the forum! I have a 72 Gmc K15 that I bought last year and have slowly fixing it up and driving it in between. It started having issues starting reliably last fall. I eventually replaced the battery and that seemed to help for a little while, then it was acting like it had a short, though I couldn't figure out where. it sat for the last month or so and then I needed it to move apartments, no go. I ended up arcing the starter with a screw driver to get her to run and move her over to the new apartment. I went and replaced the ignition switch and ignition connector last weekend, and same thing. I can turn it to on and the radio turns on, and lights turn on, but it won't even try the starter, no click or anything.

Now when I put in the ignition switch, I put each cable over as it was in the old. That being said there were no green cables coming into the old switch. I spent an hour or so trying to figure out where the could have gone. Also the old ignition connector was somewhat melted on the brown cable side. So I'm assuming that the greens that are missing are a ground? I know my wiring is a mess, newer deck, newer engine. (Found some paperwork under the seat on it saying it was put in "professionally" in `96) That's all of the permanent info I can think of. Would like to know what your guys thoughts are. It was working before with that setup just fine, now it's a not even trying. Thanks in advance!

jjzepplin · 01-23-2015, 08:59 AM

So you don't have the plastic connecter the plugs all the wires onto the back of the switch?

ElKotze · 01-23-2015, 09:31 AM

You didn't mention if it is an automatic or standard transmission. If it's auto, it could be the neutral safety switch.

zodari · 01-23-2015, 11:26 AM

Yes I bought a new connector, as the old one had a spot that was melted. And the truck is an automatic. Where is the neutral safety switch located? Any thoughts on the green wires?

Big Kev-O · 01-23-2015, 11:33 AM

Neutral safety switch is on the steering column near the firewall inside the cab. It has slotted holes for adjustment. Mine was faulty and my truck didnt have the green wires on the original plug.

zodari · 01-23-2015, 11:38 AM

Ok, so under the dash on the back of the column? I will deal with it today after work thanks!

Custom/Ten · 01-23-2015, 11:40 AM

Yea could b Nss, what's your battery voltage?

01-23-2015, 03:23 AM	#1
zodari Registered User Join Date: Oct 2014 Location: Issaquah, WA Posts: 5	Not starting, new battery, new ignition switch... New to the forum! I have a 72 Gmc K15 that I bought last year and have slowly fixing it up and driving it in between. It started having issues starting reliably last fall. I eventually replaced the battery and that seemed to help for a little while, then it was acting like it had a short, though I couldn't figure out where. it sat for the last month or so and then I needed it to move apartments, no go. I ended up arcing the starter with a screw driver to get her to run and move her over to the new apartment. I went and replaced the ignition switch and ignition connector last weekend, and same thing. I can turn it to on and the radio turns on, and lights turn on, but it won't even try the starter, no click or anything. Now when I put in the ignition switch, I put each cable over as it was in the old. That being said there were no green cables coming into the old switch. I spent an hour or so trying to figure out where the could have gone. Also the old ignition connector was somewhat melted on the brown cable side. So I'm assuming that the greens that are missing are a ground? I know my wiring is a mess, newer deck, newer engine. (Found some paperwork under the seat on it saying it was put in "professionally" in `96) That's all of the permanent info I can think of. Would like to know what your guys thoughts are. It was working before with that setup just fine, now it's a not even trying. Thanks in advance!

01-23-2015, 08:59 AM	#2
jjzepplin Registered User Join Date: Feb 2012 Location: Ruskin Florida Posts: 4,559	Re: Not starting, new battery, new ignition switch... So you don't have the plastic connecter the plugs all the wires onto the back of the switch? __________________ 70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350

01-23-2015, 09:31 AM	#3
ElKotze Registered User Join Date: Nov 2014 Location: Southwest Kansas Posts: 306	Re: Not starting, new battery, new ignition switch... You didn't mention if it is an automatic or standard transmission. If it's auto, it could be the neutral safety switch.

01-23-2015, 11:26 AM	#4
zodari Registered User Join Date: Oct 2014 Location: Issaquah, WA Posts: 5	Re: Not starting, new battery, new ignition switch... Yes I bought a new connector, as the old one had a spot that was melted. And the truck is an automatic. Where is the neutral safety switch located? Any thoughts on the green wires?

01-23-2015, 11:33 AM	#5
Big Kev-O Registered User Join Date: Mar 2014 Location: Simi, CA Posts: 495	Re: Not starting, new battery, new ignition switch... Neutral safety switch is on the steering column near the firewall inside the cab. It has slotted holes for adjustment. Mine was faulty and my truck didnt have the green wires on the original plug.

01-23-2015, 11:38 AM	#6
zodari Registered User Join Date: Oct 2014 Location: Issaquah, WA Posts: 5	Re: Not starting, new battery, new ignition switch... Ok, so under the dash on the back of the column? I will deal with it today after work thanks!

01-23-2015, 11:40 AM	#7
Custom/Ten Registered User Join Date: May 2014 Location: Mobile, AL Posts: 422	Re: Not starting, new battery, new ignition switch... Yea could b Nss, what's your battery voltage?



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