I need a wiring diagram for 93 jeep grand cherokee ECM

Have you checked the ASD relay to see if it is working ?

If the check engine light does not light up on the dash when you turn on the ignition, at those times when your jeep doesn't want to start, then your main jeep ecm is in need of repair. The fuel pump relay will get energized only after that check engine light comes on. It's a known problem, especially with the first and second year production Grand Cherokees, 93 and 94.

Did you replace it with a re-manufactured or used ecm? If used, not all ecms are compatible with every vehicle. It has to be the exact same numbers on the ecm, matching the one in your jeep.

If no damaged wiring is found, it's most likely an internal fault in the ECM (Engine control module, computer, PCM, ECU, whatever you want to call it, it goes by many names)
The Voltage Regulator is built into the ECM on virtually every Chrysler product (including Jeeps) after 1987 or so. And it is prone to failure. If it does fail, you either have to replace the ECM or install an External Chrysler Voltage Regulator, which requires some wiring harness modifications and a few parts that can be purchased at your favorite auto parts store.
To do the External conversion, you'll need :
1 Chrysler Voltage Regulator (virtually any Dodge/Plymouth from 1970 - 1986. It's best to order one for a 70's 4x4 Truck with a 318 engine though, to avoid any possible mix ups)
1 Chrysler Voltage Regulator Pigtail (this is the plug that connects to the regulator)
Roughly 10 feet of 14 gauge wire, possibly less, depending on where you want to mount the regulator.
Most, if not all Regulators now include a wiring diagram in the box, for this purpose, just follow the diagram and match up the field wires on the alternator with the ones in the diagram. On a '93 Jeep one field wire should be Blue, the other should be Green.

Nice Jeep 1993 Jeep Grand Cherokee 4.0 liter L6 VIN "S"




I have one 5.2L V8; good luck.

We assuming that you are talking about Fuse Block Compartment (inside the car) and the Fuse 8 15AMP work for Fused Battery-Memory Circuits

Additional details could fin in the Jeep-ZJ-Secc-8W-Wiring-Diagrams; keep in mind that you have a nice SUV, I have the same but '93 Grand Cherokee Limited 5.2L V8.

Good luck.

Here is a diagram of your fuse panel

11 is no reference signal from cam position sensor (distributor) 12 means you cleared the codes before that test, 25 deals with the idle air control motor...possible wiring or open circuit.
Make sure you check all fuses before going further. A blown fuse can give all kinds of strange codes. Then go back to testing components.
http://www.scribd.com/doc/18999822/Jeep-Wiring-2. Diagram is for a 93 but is pretty close to what you have. Test procedures are contained in chilton and haynes manuals...I prefer chilton as their wiring diagrams are more accurate.

I suggest check here for find all section about Jeep 1993-1998 ZJ Grand Cherokee - Service Repair Manual

I have one ZJ '93 5.2L V8, nice SUV.

Good luck (remember comment and rated this).

you can get on at a autoparts store