Question about 1996 Geo Tracker 2 Door

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I need diagram to the relays.

I have a short in my inginition system, I am not getting any spart to the spark plugs?... and I have a relay that is buzzing?

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  • Geo Master
  • 20,706 Answers

That is the ECU is bad, or fuel pump shorted.
there is a page that shows how to fix the MAD ECU box.
id say its not ecu, but there is a short some where.
96 ECU never fail.

my guess is shorted 02 oxy sensor or its wires melted against
the exhuast, shorting the ECU power to same.

http://www.fixkick.com/ECU/clicking/clicking.html


No spark, only.
crank engine for 5 seconds. with scan tool connnected
release key and bingo, DTC tells you why.
bad cmp, ckp, or rpm dead.?

easy finds
unplug O2 sensor plug conn. at fire wall.
no fix clicking, ?
then at left rear tail , behind it, is huge conn. with huge pink wire.
pink is pump. pull connector, fix buzz? bingo shorted pump.
the pump can short partially and cause the ECU to go nuts.
the pump normal draw is 4 amps not 14..
a new filter for the pump , in front of tank , makes pump last 10x longer.
the full 96 EFI schematic is here. see all paths

see left, middle right links here.
http://www.fixkick.com/schematics-run.html

Posted on Mar 29, 2014

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2000 JIMMY 4.3 WONT START AND KEEP BLOWING MAIN 40AMP FUSESE


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That 40amp fuse powers a lot of subsystems !

Here is a web site for free diagrams !
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fuel pump-rncaqa0mdy1o2xgf3mwom2ma-1-0.jpg

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I hope you know that you have a short somewhere.
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