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Old 08-24-2013, 06:22 AM   #1
ab_70chevy
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1970 wont crank

350 with a MSD ignition. Started fine yesterday morning,went out after work and nothing. Iv got power, when I try to turn the truck over, radio comes on, iv got lights, little red brake light comes on on the dash, but it just won't crank. Replaced the battery, still nothing. Any one else have this problem, starter wire mabye? Havnt had a chance to go back out and play withit yet.
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Old 08-24-2013, 07:11 AM   #2
Square_78
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Re: 1970 wont crank

Bang the starter with the wooden handle of a hammer a few times. Might be a dead spot.
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Old 08-24-2013, 08:35 AM   #3
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Re: 1970 wont crank

Quote:
Originally Posted by ab_70chevy View Post
350 with a MSD ignition. Started fine yesterday morning,went out after work and nothing. Iv got power, when I try to turn the truck over, radio comes on, iv got lights, little red brake light comes on on the dash, but it just won't crank. Replaced the battery, still nothing. Any one else have this problem, starter wire mabye? Havnt had a chance to go back out and play withit yet.
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Originally Posted by Square_78 View Post
Bang the starter with the wooden handle of a hammer a few times. Might be a dead spot.
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Yeah, tap the starter and see if that helps. Jump the starter solenoid to bypass the ignition switch and see if it cranks. That'll narrow down the potential trouble-spots. Probably just the starter....
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Old 08-24-2013, 10:01 AM   #4
cdowns
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Re: 1970 wont crank

neutral safety switch
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Old 10-02-2013, 03:58 PM   #5
ab_70chevy
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Re: 1970 wont crank

So..I had the starter rebuilt, and truck started great until yesterday. Same issue, no crank, no click, have all the power, lights, radio, dash, but won't crank. Where is the safety switch on these trucks? Is there anything else it can be, anything else to check?
Thanks fellas
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Old 10-02-2013, 04:36 PM   #6
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Re: 1970 wont crank

Put it in Park?

I would guess like cdowns, Neutral Safety Switch would be my guess too.... It is at the bottom of the steering column. Jump the 2 purple wires with a high current jumper and try to start it.

I have also seen oxidized battery cable terminal ends do this too.
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Old 10-02-2013, 08:56 PM   #7
bigmac73
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Re: 1970 wont crank

i had the same problem , chased it down to the ignition switch gone bad, got the starter to jump with a screw driver, then checked the NSS with a meter nothing coming from the purple wire from the ignition switch
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Old 10-02-2013, 10:33 PM   #8
68gmsee
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Re: 1970 wont crank

If your truck is manual shift, there's no neutral safety switch. Only on automatics. However, these trucks have been converted from one way to another so still check to make sure there wasn't one and p.o. bypassed it.

Use the screw driver trick as mentioned to test or isolate the starter. If you don't like the sparks, buy a remote starter sw. at local auto parts for about $15.
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Old 10-03-2013, 08:14 AM   #9
ab_70chevy
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Re: 1970 wont crank

It is a factory automatic, my guess was the ignition switch, but for how cheap they are I may just replace em both.
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