Battery keeps going flat on my 1994 Jeep Cherokee 4L. Have tested the battery and the alternator and they are fine. I think it is the alarm draining the battery and the alarm sound is not working. The car is fitted with a Sigma S30 alarm. How could I test this or disconnect the alarm to see if that worked?

SOURCE: blower motor not working 1994 jeep cherokee

Sounds like your blower motor rheostat needs to be replaced. I'm about to replace mine for the second time. Fan just quits working altogether when the rheostat goes.

SOURCE: 2000 Jeep Grand Cherokee remote starter keeps draining battery

A Simple Battery DRAW test w/ test light to Determine there is a Draw on Battery. With EVERYTHING OFF will determine that Something is Drawing Battery Down. Test light "Clamp on Neg" At Bat And the POKER AT CABLE, if it lights up you have a Draw
To Determine were it is, Pull Fuses out 1 by 1 Watching Light puting Fuse back in When you Pull a Fuse that turns the Test light off you found the Circuit that is Draining the Battery if it is A Circuit that Remote Starter is Connect to refer to Installer to Correct the Problem

NOTE TEST Light Connected this way and Electrical System in Tact Light WILL NOT BE LIT at ALL
Dont forget to keep doors closed during this Procedure

SOURCE: 1996 Jeep Grand Cherokee intermittent voltage drop, lose electric

I wont list this as a solution, but it seems that working in the area of the alt may have moved around some wiring...the alt may be OK but perhaps an adjacent wire (maybe a ground) is not well connected. Also check crimped on wire loops on alt connectors..they like to corrode at the crimp where it crushes on the actual wire.

SOURCE: 2002 wj jeep grand cherokee p1756

The governor pressure sensor is the most likley cause however an inspection of fluid or debris in trans pan would be a good idea to make sure there's nothing excessive in it. Attached is a list of possible causes however the senor would be the most common.

POSSIBLE CAUSES

• Powertrain control module
• 5 volt supply circuit open
• Check transmission fluid level and condition
• GOV press sensor signal circuit shorted to voltage
• GOV press sensor signal circuit shorted to sensor ground
• GOV press sensor signal circuit shorted to ground
• GOV pressure sensor signal circuit open
• Sensor ground circuit open
• GOV press sensor signal circuit shorted to voltage inside transmission
• 5 volt supply circuit open inside transmission
• Intermittent governor pressure solenoid
• Internal transmission problem
• Oil burnt or oil pan has excessive debris
• Other transmission DTC'S
• GOV press sensor signal circuit shorted to sensor ground inside transmission
• Valve body
• GOV press sensor signal circuit shorted to ground inside transmission
• GOV press sensor signal circuit open inside transmission
• GOV press sensor ground circuit open inside transmission
• Governor pressure sensor (high)

SOURCE: 2000 Jeep Grand Cherokee Electrical Problems

Sounds like the ECM....the computer that controls all the electrical functions on the car is having some major issues or needs to be replaced. A auto repair or auto parts store should have a diagnostic machine that will tell you for sure or you can purchase one for between $50 and $150