The instrument voltage regulator has only 2 wires on it. They do matter
where they go.
Put the wires on and (assuming that your fuel guage works), turn on the
ignition.
The guage should come up, stop, and move down a bit. If this happens the
connections are correct. If the guage moves up, then drops to zero, the
the wires are backwards. Make sure that the instrument voltage regulator is
tightly screwed to the dash. Ground is needed for it to work correctly.
The regulator is used by both the fuel guage and the temperature guage, so
not having a functioning temperatore guage will not be necessary.
One way to narrow down the temperature guage problem is to rground the terminal
on the temperature sender on the thermostat housing. If the guage comes up
'then you either have a thermostat housing that is not grounded, or the sender
is bad. Try grounding the housing to see if it shows a reading (remember to
have the engine warmed up so that there is something to read!).
If grounding the terminal doesn't get you a reading, find the wire from the
sender on the guage and ground that terminal on the guage. If that causes
a reading, then the wire is bad. If not, it is either the guage, or the
connection to the instrument voltage regulator. If you have access to a meter
you can look at the voltage on the other terminal on the guage, it should show
pulsing voltage between 0 and 12 volts, averaging about 8 volts. If the voltage
is there, the guage is bad, or the connections to it are dirty.
Good luck,
Pat
--
- Support Habitat for Humanity, A "hand up", not a "hand out" -
Pat Horne, Network Manager, Shop Supervisor, Hardware Guru
CS Dept, University of Texas, Austin, Tx. 78712 USA
voice (512)471-9517, fax (512)471-8885, UUCP:cs.utexas.edu!horne
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