1991 geo tracker doesn't usually start in colder weather.

[fixkick]

veryt good !!

Thanks fixkick;
Not being too multimeter savvy, I guess I misunderstood the meter test, by having the neg ground give me a false reading as to the voltage of my wires and connectors.
for the first test do not put the meter black test head to the cars body ground,. or the test is no good.
so below you did the test right and there is no voltage to the pump.
i guess next you hot wired the ground wire to the pump, and the pump runs
so now you know the ground to the the pump is bad.
test 2 would be: there are in fact 3 test to find the causes all..
all tests key on tests 3 seconds or cranked.
if you had then used the meter with negative blacK to the body metal ground or to battery minus lug and then red meter lead to the pump NET lug you would have measured 12vdc on the pump , showing the ground wire has and open circuit, (12vdc voltage drop on any wire in the car is an open wire) this shows ground is bad using a meter.
test 3 is meter black to ground, and red meter to HOT Plus wire terminal , youd have seen 12vdc , to the pump, even if the pump is dead. (no spin)
This test failing means the pump Plug power wire is open .
the three test prove what is wrong.
the 4th test most dont do , is walk the meter lead back on the failing wire to see the POINT OF FAILURE< most time the connector. or the ground lug in the left rear tail lamp is bad,(2door)


most times this works, if you know which wire is open.

if you then visually inspected every inch of that ground you will find the open point in the wire, and sure its intermittent, most wires this old are,and 10x that on those crap junk suzuki connectors that do not really work wet and are.
today the connectors are way better. 29 year old wring is never good. Suzuki never planned on the car lasting over 10 .
best is just replace the wire, ground, or ground the pump minus terminal any why you can.
Some folks just run all new wire pair from ECU relay to pump. (and use 18gage wire this time ,)



Once I did the crossover test between the +pos and -neg at the pump wires and then the connector, it showed little to no voltage. (BINGO)

So I attached an alligator clip and wire from the neg ground behind the taillight to the neg pump terminal, and voila the pump buzzed once the key was turned on.

Since this problem was intermittent over the years, it was a hard one to catch.
I haven't tried the full pump test with gasoline yet, but knowing I get it to buzz is satisfying.
Glad you were there to assist me.