Electrical Trouble Shooting - Airstream Excella 500 1973 Owner's Manual

Electrical Trouble Shooting
Symptom
Possible Cause Remedy
No 12-volt power
(Lights, appliances do
not work)
1. Input line and/or battery not connected
2. Trailer battery on wrong polarity
1. Make necessary connections
2. See items 3, 4, 5, and 6
Blown fuse 3. Overloaded circuit (over 50 amps)
4. Electrical short
5. Shorted battery
6. Battery terminals not properly corrected
to UNIVOLT + and - terminals
3. Turn off switches to reduce load. Replace
blown fuse in Univolt or next to Univolt.
4. Find blown fuse in Univolt and identify
circuit. From wiring diagrams check the
circuit for defective wiring, lamps or
motors.
5. Replace battery and fuse
6. Make proper connections; replace fuse
Dim lights or sluggish
fan motor
7. 25- or 50-cycle power (some foreign
countries)
8. Discharged battery (when operating with¬
out 120-volt line)
7. Use 60-cycle power
8. Charge battery
UNIVOLT will not
charge battery
9. Input line not connected
10. Battery not connected (or polarity re¬
versed)
11. Bad battery
12. Too many lights and appliances in use
13. Fuse blown
9. Connect input line
10. Connect battery to UNIVOLT
11. Replace battery
12. Reduce electrical load
13. Replace fuse
Specific gravity of bat¬
tery is too high (over
1.275)
14. Battery is low on water 14. Add distilled water to battery
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