ELECTRIC SHUTOFF SYSTEM
TROUBLESHOOTING
TIME DELAY RELAY
ON/OFF TIME DELAY (RELAY)
ON/OFF TIME DELAY (RELAY)
Performance Check
A.
Items Required For Check:
1.
Battery or any D.C. source of 8 to 40 volts.
2.
Voltmeter (6V3030 Multimeter or one of same
accuracy).
3.
Stop watch.
B.
Bench Or Installed Test
Connect or verify source voltage to relay terminals 3
(-) and 4 (+) [if bench testing, also connect positive ( + )
voltage to relay terminal 6]. All connections must be
maintained until tests are complete.
NOTE: There will be voltage when the relay is closed.
When relay is open, there will be no voltage [voltage may
be positive (+) or negative (-) when relay is tested on
engine; when bench testing, voltage will always be
positive (+)].
1.
Use the voltmeter to verify chart that follows:
Terminals
Relay Position
5
Closed
7
Open
2.
(a)
Apply positive (+) source voltage to terminal
1 and immediately verify the chart that
follows (do not leave voltage on terminal 1
for more than 60 seconds):
Terminals
Relay Position
5
Open
7
Closed
(b)
Remove positive (+) source voltage from
terminal 1. Use a stop watch and check the
time from the moment of removal to verify
chart that follows:
Terminals
Delay Time to Function
0 to 60 Secs.
After 80 Secs.
5
Open
Closed
7
Closed
Open
3.
(a)
Apply positive (+) source voltage to terminal
2.
NOTE: If bench testing, Step 3 can be used as stated.
When the unit is installed on the engine, all wires must
be disconnected from Terminal 2 to prevent a direct
short.
Check the time from the moment voltage is applied
to verify chart that follows (do not leave voltage on
terminal 2 for more than 60 seconds):
Terminals
Delay Time to Function
0 to 8 Secs.
After 10 Secs.
5
Closed
Open
7
Open
Closed
(b)
Remove positive (+) source voltage from
terminal 2. Check the time from the
moment of removal to verify chart that
follows:
Terminals
Delay Time to Function
0 to 60 Secs.
After 80 Secs.
5
Open
Closed
7
Closed
Open
4.
Remove wire from terminal 4 and verify chart
that follows:
Terminals
Relay Position
5
Closed
7
.Open
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