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When 12 volts positive is connected to the glow plug terminal and
the negative to the sheathing, the glow plug tip should glow red-hot.
To check, energize 2 to 4 times for about 30 seconds each.
Do not
energize too long because it will damage the plug.
If the glow plugs installed on the engine take too long to glow
red-hot,
one of the glow plugs is shor ted.
Usually the glow plug
takes about 25 seconds or less to glow red-hot.
A
glowplug can be checked for an open circuit fault by using a
circuit tester and checking the continuity between the positive ter-
minal on top of the glowplug and the cylinder head.
I f there is no
continuity, the glowplug should be replaced.
VOLTMETER
The voltmeter can be a useful instrument in determining the status of
your electrical system and warn you when an abnormality occurs.
The
voltmeter will indicate differently, depending when the readings are
taken.
Fully charged batteries that are in a static state should read between
12.3 and 12.6 volts on the dial.
The term static means that the bat-
tery has not been charged or discharged for at least 2 hours.
If the
reading is between 11 and 11.5 volts, then the battery is about half
discharged and should be charged to insure its usefulness.
If the
engine is started and the needle does not go up, this would indicate
that no charge is being delivered to the battery.
When the battery is being charged, the needle should be between 12.6
and 13 volts.
The needle may move up to about the 14.6 volt range
toward the end of the charge cycle,
at which time the needle drops
back to the 12.6 to 13 volt range, as voltage regulation controls this
function.
If the battery voltage exceeds 15 volts,
this indicates
that the battery is being overcharged and will damage the battery if
left unchecked.
The voltage regulator is most likely at fault.
When the battery is being charged,
(hav ing electr ical loads placed
upon it and no charging current applied), it is normal for the needle
to indicate between 11.4 and 12.6 volts.
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