DUAL POWER TRIM SYSTEM
SERVICE MANUAL NUMBER 28
90-863160 MAY 2000 Page 5C-3
TESTING RELAY NO. 2
1. Test for continuity between terminals 13 and 9.
• Continuity indicated, proceed to “2.”
• No continuity indicated, replace the relay.
2. Connect a jumper wire between terminals 3 and 5. Test for continuity between terminals
13 and 9.
• No continuity indicated, relay OK.
• Continuity indicated, replace relay.
Diode Module Test
Perform the following diode tests using an ohmmeter set on the Rx1 scale. When testing
diodes, take 2 readings. Note the first reading; then, reverse the meter leads and, again,
note the reading.
If the diode is good, the meter should indicate a high or infinite resistance (no meter
movement) when connected one way and a low reading (below 60 ohms) when connected
the other way.
If both readings are high or infinite, the diode is open. Replace the diode module.
1. Diode No. 1
a. Connect a jumper wire between terminals 3 and 5. Test the diode between terminals
9 and 10.
2. Diode No. 2
a. Connect a jumper between terminals 3 and 5. Test diode between terminals 10 and
13.
CAUTION
Before proceeding with further diode testing, remove fuse from red/purple harness
lead so that it will not be possible to short either control box or VOA meter.
3. Diode No. 3
a. Test the diode between terminals 6 and 12.
4. Diode No. 4
a. Test the diode between terminals 12 and 7.
5. Diode No. 5
a. Test the diode between terminals 8 and 11.
6. Diode No. 6
a. Test the diode between terminals 14 and 15.
7. Diode No. 7
a. Test the diode between terminals 8 and 5.
8. Diode No. 8
a. Test the diode between terminals 5 and 15.
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