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Old 01-20-2018, 02:46 PM   #1
Shane Richardson
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1971 Blazer won’t start

Hio fellow Blazer owners! Ok, I’m stumped. My Blazer won’t start or even turn over...

Details- 1971 Blazer CST. 350. 4x4. Auto.

Battery has been checked 4 times and it registered as good. Alternator has been check as well- it’s good. New starter. New ignition switch.

One day I go out to start it and nothing. No click, no turn over, nothing. Then I hook up my 1960 Wards battery charger and booster and with it plugged in to wall power source and on “boost” mode it would turn over and start instantaneously. After that I checked all the above mentioned parts and they checked out as good. So I replaced starter which I had not done, same result. So I replace ignition switch, same tesultS now it won’t ev n start using the “boost” mode jump.

Wiring? Do I need to trace wires and maybe I find a shirt?
Fuses look good.
A relay perhaps?
Voltage regulator?

I’m stumped and could use some advice!

Thanks, Shane
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Old 01-20-2018, 04:03 PM   #2
mrtoni
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Re: 1971 Blazer won’t start

Try wiggling column shifter. Neutral safety?
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Old 01-20-2018, 05:32 PM   #3
ls1nova71
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Re: 1971 Blazer won’t start

Yeah, definitely try moving the shifter while cranking and make sure the neutral safety switch isn't messing up, but if that doesn't work, look at your battery cables. Make sure the ends are clean and not corroded and the bolts are tight.
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Old 01-20-2018, 06:20 PM   #4
rsavage
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Re: 1971 Blazer won’t start

Also clean all your grounds especially the negative battery ground cable. Is the battery being load tested?
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Old 01-20-2018, 07:43 PM   #5
paul mora
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Re: 1971 Blazer won’t start

One of the best and simple ways to tell if your battery has current is to turn on your lights and honk your horn. If they both work you power to the car and it is not your battery and battery terminals are not corroded. Time to look neutral safety switch or ignition or starter,
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Old 01-20-2018, 09:52 PM   #6
1967GTO
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Re: 1971 Blazer won’t start

Sounds like a battery or connection at the battery to me.
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Old 01-21-2018, 12:13 AM   #7
Shane Richardson
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Thanks guys. Wire brushed neg battery term at the block and tightened- was not “loose” but I could move the terminal. Positive cable has a splice with a little cast connector that I am gonna lose by using a new pos cable. Also re-terminating, at the positive terminal, the red wire coming from regulator- there was a questionable splice in that wire as well. Ignition switch and starter are brand new as mentioned. More updates 2mro. Thanks again.
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