89 4.0 Climate Controls not working

[89 MJ]

The climate controls are not working in my MJ. The fuses are all good. Any ideas? Thanks. 

[JMO413]

They are all ran on vacuum. The supply line connects in the engine compartment by the heater core lines.

[87MJTIM]

3 hours ago, 89 MJ said:

The climate controls are not working in my MJ. The fuses are all good. Any ideas? Thanks. 

 

Can we get more info? 

 

Is the fan not working? 

Is AC not working? 

Is the heater not working (I don't know why you need heat in August)?

[89 MJ]

There is no electrical power to the switch. 

[Ωhm]

13 minutes ago, 89 MJ said:

There is no electrical power to the switch.

Try with the key in the ACC position.

[89 MJ]

3 hours ago, Ωhm said:

Try with the key in the ACC position.

Thanks. It still didn’t work. 

[Ωhm]

9 hours ago, 89 MJ said:

The fuses are all good.

 

With fuse installed, does Blower fuse (25A) have B+ on both sides? KEY ON or KEY ACC.

[Ωhm]

KEY ON or KEY ACC. Does the Horn and/or Wipers work?

[89 MJ]

I’ll need to check on those. I appreciate the help!

[JustEmptyEveryPocket]

Ohm is the man for electrical help. Follow his advice and steps and you will get it sorted in no time.

[89 MJ]

We got it fixed. It was a broke. Terminal in the fuse box. Thanks for the help!

[Cheapamanche]

Cool cool. My issue was a broken vacuum line. The small hard line running from the vacuum canister under the bumper had a large slit in it. Man was it a pain to find.

[89 MJ]

12 minutes ago, Cheapamanche said:

Cool cool. My issue was a broken vacuum line. The small hard line running from the vacuum canister under the bumper had a large slit in it. Man was it a pain to find.

I’ll bet. Do you know what caused the slit?

I have heard that can be caused by driving over economy cars...

[Cheapamanche]

Hahahaha. It looked like my battery leaked a little onto the line and it melted it. don't over fill your battery. Lesson learned.