Ground Controls; Control Relays - Genie S-80 Service Manual

Service Manual

Ground Controls

6-1

Control Relays

Relays used for single function switching are single
pole double throw (SPDT) relays.
How to Test a Single Pole Double
Throw Relay
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
Electrocution/burn hazard. Contact with electrically
charged circuits could result in death or serious
injury. Remove all rings, watches and other jewelry.
1 Tag and disconnect all the wiring from the
relay to be tested.
2 Connect the leads from an ohmmeter or
continuity tester to each terminal combination
and check for continuity. Terminals 85 and 86
represent the coil and should not be tested in
any other combination.
Test
terminal 85 to 86 with resistor
terminal 87 to 87a and 30
terminal 87a to 30
112
3 Connect 12V DC to terminal 85 and a ground
wire to terminal 86, then test the following
terminal combinations.
Test
terminal 87 to 87a and 30
terminal 87 to 30
• terminal no. 87a - N.C.
• terminal no. 85 - coil negative (-)
• terminal no. 30 - common
• terminal no. 86 - coil positive (+)
• terminal no. 87 - N.O.
Desired result
75 to 85Ω
no continuity
(infinite Ω)
continuity
(zero Ω)
S-80 • S-85 • S-80X
Control Relay Schematic
Part No. 1259369GT
February 2017
Desired result
no continuity
(infinite Ω)
continuity
(zero Ω)