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Topic: 81 tbird charging system help (Read 958 times) previous topic - next topic

81 tbird charging system help

Hey guys been having sum problems with my charging system in the 81 tbird. I just cooked a brand new interstate battery. The battery was tellin me it was being charged 14 volts at all times..well i got a new alt and new battery..everythings ok but when ya rev it goes up to 16volts and stays...so obviously its the external regulator is somehow wired wrong. Can anyone get me a wiring schematic for it?

81 tbird charging system help

Reply #1 –
Have you had the regulator tested?

What have you changed?
Long live the 4-eyes!  - '83 Tbird Turbo - '85 Marquis LTS - '86 LTD Wagon-  '81 Granada GL 2dr
 

81 tbird charging system help

Reply #2 –

81 tbird charging system help

Reply #3 –
Sounds like bad voltage regulator. Mine was charging at 18v and draining the battery overnight.
Matt
1984 Thunderbird - 89 302 HO, GT40 heads w/ Trick Flow springs, E303 cam, Edelbrock Performer 289 intake and 600 cfm 4bbl, Mustang headers, Jegs o/r H pipe, Dynomax lers, Mustang AOD and shifter, Mustang 8.8 w/ 3.73s, 3G alternator, Mustang front and rear sway bars, KYB SN-95 front struts and shocks, and 11" front brakes.

1988 Mustang GT - GT40 heads, Explorer intake, 70mm throttle body, 70mm MAF, Crane 1.7 rrs, E303 cam, Kirban Kwik shifter w/ Pro 5.0 deluxe handle, aluminum clutch quadrant and firewall adjuster, o/r h pipe, Dynomax lers, 3G alternator, aluminum radiator, and 3.27 gears.
 
1986 Cougar 5.0, 1989 Mark VII LSC 5 speed, 1980 Mercury Zephyr 4 door (sold)

81 tbird charging system help

Reply #4 –
Quote from: 5.0 bird;245825
Sounds like bad voltage regulator. Mine was charging at 18v and draining the battery overnight.


thats cause nobody's figured out how to store AC in a battery to date:D