Not enough power

[ec_3000]

I have a problem with my '89 Cherokee Laredo. IF I have my radio on and nothing else it's fine, but if I turn on my a/c or use my d/c outlet it drains the power from my radio and it gets staticy. Is this a problem w/ my voltage regulator. I've already replaced my alternator and battery. What's the deal.

 

[Ralph]

I'm not really sure what is going on, but a good place to start is to check your grounds.

RR3

 

[Lou]

Well, the A/C compressor will generate some noise. What are you plugging into the outlet? If it's something like a power inverter, again, another fine source of noise.

What happens when you use the cigarette lighter? If you don't get any static, chances are that you need to install a noise suppressor on the radio.

Do you get noise on the cassette as well?

Also, loose drive belt?

 

[CaptTrev]

what does your volt gauge indicate when you turn on multiple accessories?
does it also take a dive?

if it DOES take a dive, and you replaced the battery and alternator already.....check for a loose main serp. belt.

also check for bad grounds, especially on the battery itself

 

[Don Becker]

I may be mistaken but, I think I correctly recall that the voltage regulator is an integral part of the alternator, which you've already replaced . . . .