voltage surge

[curlygrooms]

had this problem with my last 2 1990 broncos,when i romp on it and it kicks into passing gear the voltage guage pegs all the way,lights get brighter,and the battery light kicks on,after backing out of it and letting it shift back into overdrive,the guage goes back to normal,lights dim back to normal,and the battery light goes out.when i hit passing gear is the only time it overloads.anyone have any ideas?

 

[miesk5]

had this problem with my last 2 1990 broncos,when i romp on it and it kicks into passing gear the voltage guage pegs all the way,lights get brighter,and the battery light kicks on,after backing out of it and letting it shift back into overdrive,the guage goes back to normal,lights dim back to normal,and the battery light goes out.when i hit passing gear is the only time it overloads.anyone have any ideas?

yo,

Gauge readings should be between 13.2 and 14.5 volts with the ignition on and the engine running. Higher readings could indicate a failed regulator or poor wiring connectors which are common for 90 year

Alternator Connector Failure, 85-90 Bronco, Econoline Source: by Nastra.com

Alternator Connector, Ford IAR replacement Source: by genco1.com

NAPA or Ford dealer should have the good replacement parts.

& another poss. Ford IAR Burn Up - loose connection between rectifier & wiring harness

gl!

I like the diy stuff bec I need $ for other thAngs...but get a free ck at a local Auto Electric shop; & maybe install a rebuilt unit or a 3G if you have audio upgrades