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05-14-2018
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Join Date: Aug 2014
Location: Montgomery TX
Posts: 263
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High amp draw - diagnostic assistance
I've burned up two alternators pretty quickly. After the last install, I put the original pulley on (larger thinking my constant 7000 rpm adventures were killing alts...) but the voltage was very low at idle with AC on.
When The Car is hot and both fans are on high speed, the voltage is low (12vdc)when cold and the AC is on the voltage drop is the same or a little lower. Amp draw is 15-17 on both fans, and around 20 on the AC blower motor. Recon I need cooling fan motors or a new blower motor? The blower doesn't feel like it blows as hard as it once did... Thanks Jay. PS. Haven't posted in awhile but I'm still beating the snot out of this thing, and loving every minute!!! Sent from my SM-G950U using Tapatalk
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1991 White ZRJuan #1616 Mileage: 56K Sept-14 -- 113k May-18!!! God Damn I Love This Car! |
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05-16-2018
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#2 |
 
Join Date: Sep 2016
Location: Ocala, FL
Posts: 891
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Re: High amp draw - diagnostic assistance
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Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much. |
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05-16-2018
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#3 |
Join Date: Nov 2016
Location: Norway
Posts: 397
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Re: High amp draw - diagnostic assistance
You're certain that the battery is in good condition?
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- '90 ZR-1 |
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05-17-2018
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#4 |
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Join Date: Aug 2014
Location: Montgomery TX
Posts: 263
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Re: High amp draw - diagnostic assistance
The Alternators are from Jerry, the only way to go IMHO. The Battery is New, but it's done it with two or three different batteries.
I'm putting it on the lift after work to install my Watson Headers and New ZF6. When i get it running again, i'll write down my current draw for: Fan1, Fan2, AC Blower Motor, and Total Current load. It's got to be something easy. It only shows low VDC when the coolant temp is high @ idle or when the AC is on @ idle.
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1991 White ZRJuan #1616 Mileage: 56K Sept-14 -- 113k May-18!!! God Damn I Love This Car! |
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05-18-2018
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#5 |
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Join Date: Sep 2016
Location: Ocala, FL
Posts: 891
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Re: High amp draw - diagnostic assistance
Could it be the bearings in the fans are dry and causing too much friction and a high amp load? It might be worth looking into.
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05-18-2018
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#6 |
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Join Date: Aug 2014
Location: Montgomery TX
Posts: 263
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Re: High amp draw - diagnostic assistance
I have the inner fenders off for header install that has grown to motor mount replacement and header install. I'll take it off tomorrow and spin it. Thanks for the idea!
Sent from my SM-G950U using Tapatalk
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1991 White ZRJuan #1616 Mileage: 56K Sept-14 -- 113k May-18!!! God Damn I Love This Car! |
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Linear Mode
