Hummer H1 Service Manual page 329

5-130 Transmission/Transfer Case
Automatic Transmission Wiring Harness Check (Cont'd)
Step
9 Measure the resistance between terminals L and
M (Transmission Fluid Temperature Sensor)
Is the resistance within the values indicated?
10 Measure the resistance from terminals
A,B,C,D,E,L,M,N,P,R and S of the A/T Wiring
Harness Assy. at the transmission 20 way connec-
tor to the transmission case.
Is the resistance measured greater than the value
indicated?
11 1. Disconnect the A/T Wiring Harness Assy.
from all the components.
2. Measure the resistance from all the compo-
nents terminals to the transmission case.
Is the resistance measured greater than the value
indicated?
12 Inspect for high resistance or a shorted condition:
• Inspect the A/T Wiring Harness Assy. for
• Look for possible bent, backed out, de-
• Inspect for weak terminal tension
• Inspect for chafed wire that could short to
• If diagnosing for a possible intermittent
Was high resistance or a shorted condition found?
13 Replace the A/T Wiring Harness Assy.
Is the replacement complete?
14 Replace the faulty component.
Is the replacement complete?
Action
poor electrical connections at the transmis-
sion 20-way connector and at the compo-
nent connectors.
formed, or damaged terminals.
bare metal or other wiring.
condition, move or massage the A/T Wir-
ing Harness Assy. while observing test
equipment for a change.
___________________________________________
Value(s)
3333-3689Ω @
20° C (68°F)
24-31Ω @
100°C (212°F)
250 kΩ
250 kΩ
Yes
Go to step 10 Go to step 12
No problem Go to step 11
found. Exit
table
Go to Step 12 Go to Step 14
Verify the repair Go to step 13
and go to Step 1
Verify the repair
and go to step 1
Verify the repair
and go to step 1
®
No