Ok. I made an OBD-1 jumper as per the haynes manual for a 94 Jeep Grand Cherokee Laredo 5.2 and something went haywire! The good news is that the check engine light no longer comes on - the bad; the fuel pump won't come on when the key is turned on and thus the jeep will not run. What is the deal?! What can I do to make it work again? Please help.

Check all under hood and under dash fuses with a test light or multimeter:

https://www.askmehelpdesk.com/cars-t...tml#post252145

Normally, if the ECM is not working, the fuel pump won't either.

Oh thank you so much! Apparently all you have to do to get the codes for 95 and earlier chrysler vehicles is cycle the ignition; on, off, on, off, and on one last time. My codes are 33 & 22. I will try to find out what they mean and let you know.

33 is A/C clutch relay circuit open/short.
22 is coolant sensor voltage low.