Voltage Q...

Hey,


'88 XJ Cherokee Laredo 4.0L Auto.


If I switch on the heater but leave the blower off I notice a voltage drop on the battery volt meter. Is the Heater Valve still being energized or something else? Is this normal?


Thx, Phil

If you move the switch to MAX, BI-LEVEL, or that other one, then yes, that is normal cause your kicking on your AC Compressor. This also occurs when you use the defrost setting.

You should not see a voltage drop with the fan off and the switch on HEAT

Also if you have the fan off, might as well move the switch to off too, makes sense to me.

On my 87 there is no blower off position, the First setting is low then 1 2 High no off.

langer1 said:

On my 87 there is no blower off position, the First setting is low then 1 2 High no off.

Click to expand...

Good call, I meant the slide switch, put that off.

edit. reareading original post more carefully. Voltage drop when fan is turned on high is normal (just a voltmeter anomaly). But I don't know whether it will do this when you turn the fan off. But before you worry, test the voltage at the battery.