Baz
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Stage II
Joined: May 2017
Posts: 2
Likes: 0
From: England
Baz
fitted brand new battery after old one died, when i turn on ignition battery goes down to 7.5 volts and if i try to start engine voltage drops to 1.5 volts, battery is fully charged.
Elite HDF Member
Joined: Sep 2008
Posts: 4,440
Likes: 148
From: Northwest
Find whatever is pulling all that juice... sounds like you have a meter... start pulling different fuses till you find the circuit that is dropping your voltage, then start going through that circuit.
Sounds like maybe a shorted starter solenoid?... but the 7.5 for just turning on the ignition is not right.. .you've got a couple of things out of whack there.
Sounds like maybe a shorted starter solenoid?... but the 7.5 for just turning on the ignition is not right.. .you've got a couple of things out of whack there.
Stellar HDF Member
Joined: Feb 2016
Posts: 2,066
Likes: 259
From: Northstreet, michigan
Your ignition shouldn't drop that low without load. Test the battery before anything. You could have one or more shorted cells. That's what I would think would be most likely. Wouldn't hurt to test amperage draw from the battery, then turn the ignition on. If it's high, you can pull fuses/disconnect components until it drops low. Let us know
Stellar HDF Member
Joined: Feb 2016
Posts: 2,066
Likes: 259
From: Northstreet, michigan
im wondering if it's a new battery or a new-used battery. When I see voltages like that at work (Chrysler tech) it's normally a shorted cell.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,894
Likes: 8,002
From: poway
Could be that or simply a new AGM battery placed that had been placed on a dumb old style charger for too long. It simply dried out...
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