Need electrical help
#2661875
06/03/19 01:53 PM
06/03/19 01:53 PM
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Joined: Oct 2003
Posts: 233 MN
Skid_Demon
OP
enthusiast
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OP
enthusiast
Joined: Oct 2003
Posts: 233
MN
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1966 Newport, 383, auto, stock except hei ignition. Fired up fine after long winter. Went for a joy ride a few days ago, now I have problems. Started it to move out of garage to wash windows, things OK. Tried to start to move back in, starter made the machine gun noise. Tested battery with meter, 12.5 volts. Put charger on. Battery up to 13.3v. Starter made same noise. Brought starter to parts store, tested good. Recharged battery, checked with load tester, passed. This morning, 12.7v at battery and same at large lead on relay. Tried jumping relay, same starter noise. I have 12.7 at battery, relay and starter. Goes down to 5-6v in key start position or jumping relay. Battery posts and cables clean. Any ideas? Thanks
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Re: Need electrical help
[Re: Skid_Demon]
#2661893
06/03/19 02:59 PM
06/03/19 02:59 PM
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Joined: Jan 2003
Posts: 25,786 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,786
Rio Linda, CA
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Try bypassing each battery cable with a jumper cable.
The INTERNET, the MISinformation superhighway
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Re: Need electrical help
[Re: John_Kunkel]
#2661910
06/03/19 04:47 PM
06/03/19 04:47 PM
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Joined: Jan 2003
Posts: 10,713 North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,713
North Dakota
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Sounds like a poor connection at the battery terminal (either/both + and -) and at the engine termination points for both cables.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Need electrical help
[Re: Skid_Demon]
#2662034
06/03/19 10:07 PM
06/03/19 10:07 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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If the battery & starter are confirmed good & the cables/terminals (incl ground path) are good the only other thing I could think of is something fubared inside the eng greatly increasing drag (not likely I wouldn't think) or dist got bumped CCW greatly increasing the initial. I gotta Keep It Simple Sam & go with inadequate amperage reaching the starter (classic machine gun clicking). Can you set a known good battery by the LF wheel & jump it underneath directly to the starter with some jumper cables & see what happens. EDIT CW, missed that this is a BB
Last edited by RapidRobert; 06/03/19 10:21 PM. Reason: missed a minor point
live every 24 hour block of time like it's your last day on earth
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Re: Need electrical help
[Re: Skid_Demon]
#2662079
06/04/19 02:51 AM
06/04/19 02:51 AM
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Joined: Mar 2003
Posts: 4,848 Memphis
HemiRick
master
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master
Joined: Mar 2003
Posts: 4,848
Memphis
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Goes down to 5-6v in key start position or jumping relay. Your battery is bad.....
Take care, Rick 68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
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Re: Need electrical help
[Re: HemiRick]
#2662169
06/04/19 10:10 AM
06/04/19 10:10 AM
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Joined: Jan 2003
Posts: 21,072 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,072
Niles , Ohio
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I agree sounds like battery.Mine went last year.Started perfect and went to cruise.Went to leave and pretty much nothing.Got it home charged and checked volts.Was at 13.Turn on key and try to start and pretty much 4 or 5 volts.New battery fixed it.Starter could be drawing a huge load though.But you would think if it drew enough amps to drop volts to 5 cables would get real hot and or smoke.Check cables also.Ive seen them look great but have corrosion inside.I run 1 gauge on mine.Rocky
Chrysler Firepower
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Re: Need electrical help
[Re: HemiRick]
#2662254
06/04/19 01:34 PM
06/04/19 01:34 PM
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Joined: Jan 2003
Posts: 25,786 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,786
Rio Linda, CA
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Goes down to 5-6v in key start position or jumping relay. Your battery is bad..... Or the cables. They can fail internally and look OK on the outside.
The INTERNET, the MISinformation superhighway
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Re: Need electrical help
[Re: therocks]
#2662258
06/04/19 01:41 PM
06/04/19 01:41 PM
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Joined: Sep 2003
Posts: 19,396 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,396
north of coder
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all good advice. "green" cable internals are not that uncommon. all it takes is a tiny crack in the insulation, moisture, and time. check your connections at ALL points. if you have those "clamp on" battery cable ends, TOSS 'EM & get NEW cables ! i've fixed more electrical issues than you can believe, caused just by those cable ends ! try jumping the battery cable to solenoid at the starter, and the relay, after determining what voltage is present at the battery cable[s]. that may narrow your search. electrical can be very frustrating at times, but we have confidence in you ! please keep us up to date on your progress.
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Re: Need electrical help
[Re: moparx]
#2662303
06/04/19 04:53 PM
06/04/19 04:53 PM
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Joined: Jan 2003
Posts: 8,022 Tulsa OK
Bad340fish
master
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master
Joined: Jan 2003
Posts: 8,022
Tulsa OK
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Did they use a real load tester or did they use a digital tester? The digital testers do not put a load on the battery, they just check the internal resistance and spit out a number. They can be accurate but it is entirely possible for a battery to pass a digital test and fail an actual load test.
The severe voltage drop makes me think bad battery, or locked up motor.
68 Barracuda Formula S 340
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