1995 Isuzu Trooper A/C drawing down voltage

JB3613JB60

MEMBER
1995 ISUZU TROOPER
118,000 MILES

A/c magnetic clutch was engaging/disengaging every second. I turned off a/c and wiggled the wiring to magnetic clutch. That problem stopped, but now when a/c is turned on it drops the voltage to 10 volts which will not maintain battery charge. I turned on wipers, lights and heater with no voltage drop. Shtopped

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WRENCHTECH

MECHANIC
20,761 POSTS

Where are you reading that voltage?

Is the engine running?

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Monday, August 5th, 2013 AT 4:13 PM

JB3613JB60

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5 POSTS

Engine is running. Read on volt meter in dash

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Monday, August 5th, 2013 AT 5:47 PM

WRENCHTECH

MECHANIC
20,761 POSTS

You can't believe that. You need to read it with a digital voltmeter at the battery.

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Monday, August 5th, 2013 AT 5:50 PM

JB3613JB60

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Ok. Iwill check tomorrow. And it readsthe same I will get back to you. Thanks"

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Monday, August 5th, 2013 AT 6:22 PM

JB3613JB60

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5 POSTS

Checked with volt meter at battery with engine running and when a/c is engaged voltage is dropping from 14 to 11 volts. Turn a/c off and it is back to 14 volts. Turn lights, wiper, and heater on at same time and no voltage drop. Only when a/c is turned on. When this problem first started the magnetic a/c clutch was engaging and disengaging in rapid succesion. I wiggled the wiring to the magnetic clutch and it stopped disengaging and stayed engaged but the voltage drop problem appeared. A/C still gets cold even with voltage drop but I am afraid to use a/c for fear of draining my battery. Please advise. Thanks!