couple of electrical issues
Thread Starter
Junior Member
Joined: Dec 2006
Posts: 99
Likes: 0
From: Elk Grove, CA
Car: 1989 Pontiac Firebird Mint. cond.
Engine: 2.8L V6
Transmission: factory
Axle/Gears: factory
couple of electrical issues
where to start....
#1 car doesnt wanna turn over, battery voltage very low so i throw a charger on it get it up to 12.7 volts disconect and go to crank and the car drops to 7-8 ish (DMM reading)
leave charger in jump mode try n start and it clicks on driver kick pannel starter sounds like its spinning only not the flexplate. if the chaarger isnt connected but on a "full charge" and i go to turn it will drop to 6-7,all lights are dimmed almost off, very faint
2# go to test the Diagnostic turn key off put paper clip in on A B ground terminal turn car to on elec fans wont turn on. but SES flashes as 2 big relays are clicking in the driverside top of firewall. it doesnt even flash 1....1....2 just constant flash same pace no 1-2 reading at all no pauses jus a minor milasecond ex: 1.1.1.1.1.1.1.1.1.1.1.1
3#before when i would drive the car i would go ahead and turn defrosters on and the car would go from 13V to like 8-9V around the danger zone.
thinking might be a nice fat short......
end of story i want to swap this motor and rewire to LS because A. its a V6 B. the motor/electrical is nothin but given me pains in my rear.
(good thing i have a sportbike)
any help would be greatly apreciated
#1 car doesnt wanna turn over, battery voltage very low so i throw a charger on it get it up to 12.7 volts disconect and go to crank and the car drops to 7-8 ish (DMM reading)
leave charger in jump mode try n start and it clicks on driver kick pannel starter sounds like its spinning only not the flexplate. if the chaarger isnt connected but on a "full charge" and i go to turn it will drop to 6-7,all lights are dimmed almost off, very faint
2# go to test the Diagnostic turn key off put paper clip in on A B ground terminal turn car to on elec fans wont turn on. but SES flashes as 2 big relays are clicking in the driverside top of firewall. it doesnt even flash 1....1....2 just constant flash same pace no 1-2 reading at all no pauses jus a minor milasecond ex: 1.1.1.1.1.1.1.1.1.1.1.1
3#before when i would drive the car i would go ahead and turn defrosters on and the car would go from 13V to like 8-9V around the danger zone.
thinking might be a nice fat short......
end of story i want to swap this motor and rewire to LS because A. its a V6 B. the motor/electrical is nothin but given me pains in my rear.
(good thing i have a sportbike)any help would be greatly apreciated
Supreme Member
Joined: Jan 2006
Posts: 3,341
Likes: 10
From: Mooresville NC
Car: LOWERED ♦ CRIMSON METALFLAKE
Engine: ► 400 KUBES ◄
Transmission: 765R4
Axle/Gears: EATON POSI 4.56
VOLTAIC VOICING
Due to the fact it happens when to try to crank it (which means the defroster is not on) it’s not the defroster’s fault.
You probably have a poor connection where the +bat cable goes to the starter/solenoid.
Take the wires off, clean everything and reassemble.
Happy Racing!
If People Drove Any Slower They’d Be Going BackwardsFog lights are not driving lights. They look dorky. Turn em off slow pokes.
How bout those dorks too scared to drive without headlights on in the daytime!
.
.
Junior Member
Joined: Mar 2009
Posts: 69
Likes: 0
From: New Mexico
Car: 1988 Pontiac Trans Am GTA
Engine: 408ci Stroker, 520hp 515Ft.Lbs.
Transmission: Outlaw 700r4
Axle/Gears: 3:73
Re: VOLTAIC VOICING
I agree with NINA, sound like a bad ground at the starter. Also, i would check the cables themselves for continuity, ie.. corrosion, large cuts or splits, etc.
Thread Starter
Junior Member
Joined: Dec 2006
Posts: 99
Likes: 0
From: Elk Grove, CA
Car: 1989 Pontiac Firebird Mint. cond.
Engine: 2.8L V6
Transmission: factory
Axle/Gears: factory
Re: couple of electrical issues
hmmm i will try that and let you all know sorry took so long ive been working from the day after i posted that non stop bouncing between jobs.
Junior Member
Joined: Jul 2009
Posts: 68
Likes: 0
From: Oregon
Car: 92 GMC Sierra 2500
Engine: 5.7l
Transmission: 4L70
Axle/Gears: GT4 3.73
Re: couple of electrical issues
Sounds like a bad battery to me.
If you are fully charging the battery, then it should drop to around 10 volts when starting.
Or with just the ignition on, it should be 12 something volts.
If a battery is bad, it will not hold its charge.
Also electronic gizmos do not work well under 9 volts. And a lot of stuff including the engine controls are electronic these days...
If you are fully charging the battery, then it should drop to around 10 volts when starting.
Or with just the ignition on, it should be 12 something volts.
If a battery is bad, it will not hold its charge.
Also electronic gizmos do not work well under 9 volts. And a lot of stuff including the engine controls are electronic these days...
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