Hewittxj

So power is going to the fuse box under the hood. And the jeep cranks but no spark to coil. Fuel rail had no pressure until the pump was jumped to see if it works which it does and is pressurized now.

Ignition switch????

Wiring problem?

The jeep has been sitting over the winter and started before then.

Also the passenger side fuse box has NO POWER at all

Please help thank you

CCKen

What year XJ?

Hewittxj

1998

Hewittxj

Anyone please help all out of ideas replaced ignition switch have power to the passenger side fuse panel but that's it

CCKen

Check some fuses in the PDC.


Below is a pic of the PDC for a '99 but is similar to the '98. Below that is the layout of the PDC that I have annotated the maxi fuses.

Hewittxj

They are all good still no start

Hewittxj

Gauge is on the dash also don't work in the passenger-side fuse box doesn't get power but everything in that fuse box gets power like the windows will still roll down

CCKen

Here's a guide to the fuses in the JB that someone put together. Check fuse #11.





Here's the fuse numbering for the JB.

CCKen

Here's a guide to trouble shooting inop instrument panel gauges (blown fuses).

CCKen

There's a possibility that your CPS is causing the no start and instruments inop.


Unplug the CPS connector, turn the ignition switch to RUN, see if the gauges come back. If they do, it could be a defective CPS causing both problems.


If you decide to change the CPS I recommend using an Mopar CPS from the dealer. Aftermarket CPS' have a habit of failing right out of the box, or very soon while in service.

Hewittxj

Unplugging the CPS didn't do anything I check the fuses that didn't do anything to the gauges

The fuses that you told me to check for the fuel and ignition we're good too

I checked the one photo and found out that the fuse box under the hood the fuse for for fuel and ignition doesn't get power

CCKen

I don't see a fuse marked "Fuel and Ignition".


What fuse number is it - F20?

Hewittxj

In the first picture you posted of the PDC there is a 20amp fuse marked fuel injectors and coil that one gets no power and the one next to it marked O2S heaters

Hewittxj

So yes f20 and f23 don't get power in the PDC

CCKen

Here's some wiring diagrams for the ASD circuit.


Check F18 in the PDC and recheck F11 in the JB.


For F20 and F23 you need the ignition switch to RUN/START (Engine Cranking). The PCM provides a ground to the control coil of the ASD relay when it sees an engine rotation signal from the CPS. If the PCM does not see this CPS signal, it won't pull in the ASD relay, thus no power to the coil, fuel injectors, or O2S heaters. Also, the fuel pump won't operate when cranking, as it should.