[C320-list] Temperture Sender - 3GM30F

[Jamie Pett]

As requested, off- list send of test procedures, as well as 'stripped'
version below.  (Chris, I don't have your off-line e mail)

 

Temp Gage - 

 

 (562)699-7997 (562)699-0908 FAX

SPECIFIC TEST PROCEDURE FOR TEMPERATURE GAUGE USED BY CATALINA YACHTS

(Other systems may use a different procedure.)

There are FOUR major sources of temp gauge problems.

1 - The temp GAUGE in the engine control panel may be defective.

TEST PROCEDURE : Disconnect BROWN sender wire from "S" terminal on
gauge. Turn

on ignition switch. Pointer must deflect to extreme left. By temporarily
shorting together the

"S" (sender) and the "G" (ground) studs, pointer must deflect to the
extreme right.

Re-connect the BROWN sender wire to the gauge after the test.

2 - The brown SENDER WIRE may be DISCONNECTED from the sending unit at
the engine or

SHORTED TO GROUND.

TEST PROCEDURE: Disconnect brown SENDER WIRE from terminal at sending
unit on

engine. Attach brown wire to a KNOWN GROUND, such as engine block or
battery

NEGATIVE. DO NOT ASSUME THE BODY OF SENDER IS GROUNDED. Turn on ignition

switch. Pointer must deflect to extreme right, as in previous test.
Disconnect brown wire

from ground. If pointer STILL deflects to extreme right, brown wire is
GROUNDED at some

point between the sender and gauge.

Check ALL connection points on brown wire or replace the entire wire.

3 - The SENDING UNIT may not be properly grounded to the engine block.

TEST PROCEDURE: If the gauge tests "GOOD" and BROWN wire tests "GOOD",
touch

BROWN wire to the BODY OF THE SENDER.(the flat area where you would
place the

wrench to install the sender.) Make sure this area is free of paint. If
pointer does not deflect

to right, (as in test above), the sender body is NOT GROUNDED.

Remove the sender, and inspect the threads. If necessary, remove any
TEFLON TAPE or

PIPE DOPE COMPOUND. Clean the threads, apply some coolant to the
threads, and reinstall

the sender in the engine.

4 - The SENDING UNIT in the engine may be defective or the wrong unit
may have been installed.

TEST PROCEDURE: If the gauge tests "GOOD", the BROWN wire test "GOOD",
and the

SENDER GROUND tests "GOOD" the sending unit in the engine is defective
or the "WRONG"

unit may have been installed. The "CORRECT" sending unit has a
specifaction of:

STEWART WARNER, 240 TO 33 OHMS RESISTANCE

There are several other resistance specifications available but those
sending units WILL NOT

WORK in this application.

TEST PROCEDURE, W/TEMP GAUGE

PANEL DEPARTMENT April 22, 2003

* WHITTIER, CA. 90601 * * SEAWARD PRODUCTS *

 

Fuel Gage -

 

(562)699-7997 (562)699-0908 FAX

SPECIFIC TEST PROCEDURE FOR FUEL GAUGE USED BY CATALINA YACHTS

(Other systems may use a different procedure.)

There are FOUR components in the fuel gauge system on Catalina Yachts
and therefore four

possible sources of fuel gauge problems.

1 - The FUEL GAUGE in the engine control panel may be defective.

TEST PROCEDURE : Disconnect PINK sender wire from "S" terminal on gauge.
Turn on

ignition switch. Pointer must deflect to extreme left. By temporarily
shorting together the

"S" (sender) and the "G" (ground) studs, pointer must deflect to the
extreme right.

Re-connect the PINK sender wire to the gauge after the test.

2 - The PINK SENDER WIRE may be DISCONNECTED from the sending unit at
the tank or

SHORTED TO GROUND.

TEST PROCEDURE: Disconnect PINK SENDER WIRE from terminal on sending
unit in

tank. Attach pink wire to a KNOWN GROUND, such as engine block or
battery NEGATIVE.

DO NOT ASSUME THAT FUEL TANK IS GROUNDED. Turn on ignition switch.
Pointer

must deflect to extreme right, as in previous test. Disconnect pink wire
from ground. If

pointer STILL deflects to extreme right, pink wire is GROUNDED at some
point between the

sender and gauge.

Check ALL connection points on pink wire or replace the entire wire.

3 - The BLACK GROUND WIRE may be DISCONNECTED from the sending unit at
the tank

or NOT GROUNDED at the other end.

TEST PROCEDURE: If the gauge tests "GOOD" and PINK wire tests "GOOD"
attach pink

wire to the black GROUND wire on the sending unit at the tank. If
pointer does not deflect

to right (as in test above) the black wire is NOT GROUNDED.

Follow the black wire from the sending unit in the tank and make sure it
eventually

CONNECTS TO FROUND.

4 - The SENDING UNIT in the tank may be defective or the wrong unit may
have been installed.

TEST PROCEDURE: If the gauge tests "GOOD", the PINK wire test "GOOD",
and the black

GROUND wire tests "GOOD" the sending unit in the tank is defective or
the "WRONG" unit

may have been installed. The "CORRECT" sending unit has a specifaction
of:

STEWART WARNER, 240 TO 33 OHMS RESISTANCE

There are several other resistance specifications available but those
sending units WILL NOT

WORK in this application.

FUEL GAUGE TEST PROCEDURE

PANEL DEPARTMENT April 22, 2003

* WHITTIER, CA. 90601 * * SEAWARD PRODUCTS *

 

 

Jamie Pett

Bella Luna

#614