Question about 1985 Chevrolet S-10 Blazer

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1985 k5 blazer charging problem. Battery and alternator replaced and still do not getting 14 volts to battery. Check cables and wires and I do not see or ohm out ant problems?

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  • Anonymous Mar 31, 2014

    low battery volts. noises from alternator



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Check the Voltage regulator and on some older vehicles there is a ceramic block looking device, usually mounted on the firewall, that may have gone bad. I had this happen in a Plymouth once. I went through weeks of tracing till a mechanic finally told me to look at that and it turned out to be the problem. I have no idea what it does or why but it was a pain.

Posted on Aug 08, 2010


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2003 Chevy blazer battery keeps running fown

What you have is called a draw. You can read about troubleshooting a draw at the link below. Go to the section on dead battery. Do It Yourself Diagnosis and Repair

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My 97 blazers clicks one time but wont start needs to get jumped to start most of the time lights and radio work also

check your alternator. To do that take a volt meter and check the voltage in the battery with the engine NOT running. It should be around 14 volts... but for the sake of testing lets say it is 12.5 volts. Now start the engine and check the batter voltage again. If it is lower than 12.5... The alternator is shot

Jan 16, 2015 | 1997 Chevrolet Blazer

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Have 1985 w150 pick up that's not charging, replaced battery,voltage regulator,an alternator, an still not charging

1985 WOW ! does it run at all ? if it does , check battery voltage, should be between 12---14 volts, check alternator also, a parts store can do this for you ! is your regulator outside your alternator ? cause most new alternators have them inside the alternator ! just thinking out loud, but stranger things have happened ! are these new parts the correct ones for your make & model ? battery terminals clean, tight ! make sure all GROUNDS are good ! very important ! what condition are your battery cables ? is your BELT good, tight, not slipping !!! sure your starter & solonoid OK ! not shorting out, from dirt, grease, oil, etc., all fuses OK! I think we covered it, take your time, go over what I mentioned, see it you find the problem, good luck !

Mar 14, 2013 | 1986 Dodge Ramcharger

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I have a 2002 chevy blazer 4x4 4.3 ... had to get a jump to get it started ran just fine drove it home shut it off and tried to start it and it just clicks..battery cables are tight and not corroded

is the alternator charging! if it is you have a bad battery. charging voltage with engine on should be at least 13-6 to 14-2 volts at battery if alternator is charging.

Oct 08, 2011 | 2002 Chevrolet Blazer

1 Answer

New battery , wires and plugs and still have trouble starting in the mornings, get a jump and starts. After running vehicle for awhile I turn it off and try starting it it will start.

check alternator output with engine should have 13.5 - 14.5 volts if not alternator not charging.check alternator wiring to battery feed to alternator.check alternator voltage regulator wiring check alternator fuse make drive belt not slipping.and you have the correct cold cranking amp battery.bad old worn out battery cables will cause charging problems.because old battery cables put high resistance on the charging circuit.if battery cables old as vechicle replace them.

Apr 15, 2011 | 1994 Chevrolet S-10 Blazer

1 Answer

1985 Honda prelude carbed. The battery light is on an I changed the altenator an regular an battery an it's still on but when I rev the engine over three grand it goes out but I can only drive the car...

From what you have described either the replacement alternator or regulator are faulty.all 1985 model here have the reg built into the alternator.Put a voltmeter across the battery terminals while running.volts should be 14 to 14.8 if it is being charged correctly,12.8-13.9 if it is poorly charging and less if it is only running on the battery.I assume that the fanbelt is tight and not slipping.There are several other reasons that can cause this fault but establish the basics first.Make sure that the main feed wire from the alternator to the battery is fitted onto clean terminal and isnt broken internally.To test this you can carefully check volts at the alternator terminal end,be careful not to arc out on anything metal while doing may blow the charging fuse(check this anyway as part of test).the volts should be the same as reading from the battery.If it is lower,twist the wire about while reading and see if it changes.It will either need replacing if faulty or try new terminal ends first.Make sure that the replacement alt has the same plug configuration as the one you removed.Honda have a few different plugs that switch the trigger wire around(whether round or rectangular)Hope this helps you.if not get back with your test results and we can work together on this

Mar 27, 2011 | Honda Prelude Cars & Trucks

2 Answers

Put new alternator on the car and it still well not start it has to be jumped off it acts like it is not chargeing is there something i am missing

The alternator needs power from the ignition switch for the stator coil. The ground for the stator comes from the power module. Then, the charge wire from the alternator to the battery has a fusible link that you should check. Use an ohmmeter to check the continuity of the fusible link and, with the key on, back-probe the dark green wires to the alternator to see if one of them is getting 12 volts from the ignition switch. The other dark green wire should have continuity to engine ground. If all of these things are true and the alternator is good, you should get at least 14 volts out of the alternator to the battery with the engine running. Let me know if you have any questions.


Dec 09, 2010 | 1985 Plymouth Reliant

2 Answers

I have a 1976 eldorado that when you disconnect the battery when running the car stalls out I replaced the alternator and battery and after a couple of days the battery died the alternator did not keep the...

A 76, huh, let's see, I don't know if that had the regulator in there or not. It sounds like the alt died, but maybe not. It won't run without the alt. And will only last about 20 mins on a full battery. I would take the alt off and get it back to the store to have it checked. That would be the quickest way to tell, just because it is new doesn't mean it is good. Don't keep on killing the battery, it can only handle so many drains. Hope this helps.

Jun 16, 2010 | 1976 Cadillac Deville

1 Answer

Alternator not charging the gage saying not charging but charging 9 volts had alternator tested its charging 14-15 voltes its got a new battery not charging good enough


May 30, 2010 | 1994 GMC Safari

2 Answers

1985 dodge powerwagon, lights went dim driving home now wont start, just replaced battery 6 months ago. starter clicked at first then nothing.

The alternator may not be charging the battery. Jump start it, and use a volt meter at the battery, red lead to positive and black to neg. The meter should read between 13 and almost 15 volts, any lower than 13 volts, the alternator is no good. (this is done with vehicle running).

Feb 02, 2010 | 1985 Dodge Pickup 4WD

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