Alternator output too high (17v) help
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Alternator output too high (17v) help
I rarely post, but this problem got me.
Car- 1999 Civic Sedan (Canada)
Engine - 1999 Integra LS (US)
ECU-OBD1 LS
Problem - I just finished the swap a few days ago, but I cant figure out why my alternator is pushing our 17v, which is way too high. I thought it was the voltage regulator inside the ALT was bad so I swap it out for a new Alternator and it still does the same thing. Thought it was the ELD so i swap in a US Fuse box (with the ELD) wired it up, tested the ELD, works correctly, 5v when nothing is on, drops as I start turning stuff on.
Funny thing is if I unplug the alternator connector the voltage drops down to 14.4v. I could run like that but I really want to figure out the problem.
Does anybody know which wire (coming from the ecu) tells the ALT to engage? i know its either the WHT/GRN (ALT C) or WHT/RED (ALT FR)wire.
Your thoughts?
Car- 1999 Civic Sedan (Canada)
Engine - 1999 Integra LS (US)
ECU-OBD1 LS
Problem - I just finished the swap a few days ago, but I cant figure out why my alternator is pushing our 17v, which is way too high. I thought it was the voltage regulator inside the ALT was bad so I swap it out for a new Alternator and it still does the same thing. Thought it was the ELD so i swap in a US Fuse box (with the ELD) wired it up, tested the ELD, works correctly, 5v when nothing is on, drops as I start turning stuff on.
Funny thing is if I unplug the alternator connector the voltage drops down to 14.4v. I could run like that but I really want to figure out the problem.
Does anybody know which wire (coming from the ecu) tells the ALT to engage? i know its either the WHT/GRN (ALT C) or WHT/RED (ALT FR)wire.
Your thoughts?
#3
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Re: Alternator output too high (17v) help
been looking around WHT/GRN is Control. read a few troubleshooting procedures and they all talk about the WHT/GRN wire.
Checked all wires and made sure there is connection and no short, everything checks out.
Big white wire is showing the alternator output
Blk/Yel- is battery voltage
Wht/Blu (to cluster charge light) - is battery voltage
Wht/Red (ALT FR)- shows 5volts
wht/Grn (ALT C) - not sure how to test this
starting to wonder if its the ECU...
Checked all wires and made sure there is connection and no short, everything checks out.
Big white wire is showing the alternator output
Blk/Yel- is battery voltage
Wht/Blu (to cluster charge light) - is battery voltage
Wht/Red (ALT FR)- shows 5volts
wht/Grn (ALT C) - not sure how to test this
starting to wonder if its the ECU...
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