I have a 98 Jimmy with a new problem...
The vehicle won't start. I here the fuel pump run when I switch the key to
RUN, and the engine cranks when in START, but it won't catch.
A couple of interesting related symptoms:
1. The shifter is stuck in park (with my foot on the parking brake of
2. The guages are all stuck a 0 (even in the run position).
Do I have multiple problems? Is there a shift interlock cable that also
tells the PCM to fire the ignition?
Ideas? Is this a common problem? (I'm hoping not to mess with the steering
column since I have an air bag).
I can see the ignition switch being the cause of ignition not firing, but
how would this affect the shift interlock?
I think that the crank is on a seperate switched circuit than guages & PCM -
that might explain the guages staying off.
You were right, just the ignition switch. The switch has two seperate
circuits, one which cranks the engine, another which powers the PCM (for
firing the plugs) and for the guages. One of the circuits didn't work.
It also explains the shift lock problem - it seems that by 1998 GM used
solenoids only (no more cables)...thus the open circuit kept the solenoid
from pulling in.
I disassembled the ignition switch and cleaned contact, etc. I found one
badly arced so I cleaned and adjusted the flex.
Thanks for the help.
The wires on the ignition switch appear to be welded (and soldered) - and
the other end of the wires go to pins in the C100 type connector. Would a
new switch come with a wiring harness ending in pins - or would I need to
weld the big ignition wires? (In which case I don't have the tools)
The new switch will come with the connector and terminal pins, no
welding, soldering, splicing, crimping etc. needed.
Once you see the new switch, it will become readily obvious how
the plug is configured, and considering that you managed to
remove, disassemble and clean the old switch, putting in a new
one should be fairly easy for you. 8^)
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