Batteries not charging
05 Cougar fifth wheel, 2 year old Costco batteries. Today tried to fix problem battery not charging when on AC power. Seems to charge ok when connected to truck; not sure. DC lights do brighten wh...
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IF battery hooked up backwards...reverse polarity fuses ON converter BLOW....BUT if they are blown the converter has NO DC output.
Lights work so reverse polarity fuses OK
Battery in-line FUSE (or a DC circuit breaker) on Battery POS cable to converter.
If BLOWN.no DC from battery and No charging from converter to battery
Measure DC Voltage at converter where battery wires connect......with converter OFF and then with converter ON.
In-line fuse blown...no DC Voltage at converter with converter OFF (S/B 13.2V with converter ON....or converter failing)
Battery NEG cable not making good ground connection on frame
Lights work so reverse polarity fuses OK
Battery in-line FUSE (or a DC circuit breaker) on Battery POS cable to converter.
If BLOWN.no DC from battery and No charging from converter to battery
Measure DC Voltage at converter where battery wires connect......with converter OFF and then with converter ON.
In-line fuse blown...no DC Voltage at converter with converter OFF (S/B 13.2V with converter ON....or converter failing)
Battery NEG cable not making good ground connection on frame
