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Tools Required: Volt/Ohm meter (V.O.M.), 12 volt power source, 10 K ohm resistor.
1) Check for continuity in the input fuse with the ohm meter. If the fuse is blown, replace with
another of the same type and value. (See previous section, FUSE REPLACEMENT.)
If the StartGuard is blowing fuses repeatedly, check to make sure your load does not exceed
20 amps. If the fuses continue to blow and you are certain the StartGuard is not being
overloaded, return the unit to NEWMAR for service.
2) Disconnect all wiring to the StartGuard.
3) Connect the 10 K ohm resister between the (+) and (-) OUTPUT terminals. Note: If you
check voltage on the output without the resistor attached you will read some output
voltage. This is due to reverse diode leakage and is normal. Use the volt meter to measure
the voltage on the OUTPUT terminals. With the resistor wired across the output terminals,
you should measure less than 1 volt.
4) Now apply 12 VDC from your power source (power supply or 12 volt battery) across the
STARTER #1 and INPUT (-) terminals. (Connect power supply (+) to STARTER terminal
and power supply (-) to INPUT (-)). You should hear an audible click and the voltmeter
should read 12.4 - 12.7 VDC. Repeat this step with the input power applied across the
STARTER #2 and INPUT (-) terminals. If applying 12 VDC power to either of these terminals
does not bring the internal battery on-line, the unit should be returned to NEWMAR for
service.
5) If the internal battery does come on-line but the voltmeter indicates less than 12 VDC,
recharge the battery with an input voltage of 13.8 - 14.8 VDC for 3 - 4 hours. Then discon-
nect the input, wait 10 minutes, and repeat steps 2 through 4. If you still are not getting a
normal 12.4 - 12.7 VDC reading, the battery must be replaced. (See previous section,
BATTERY REPLACEMENT)
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