October 2016
Service and Repair Manual
Ground Controls
Part No. 1269074
S-80 • S-85 • S-80X
55
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
Desired result
terminal 85 to 86 with resistor
75 to 85
Ω
terminal 87 to 87a and 30
no continuity
(infinite
Ω)
terminal 87a to 30
continuity
(zero
Ω)
3
Connect 12V DC to terminal 85 and a ground
wire to terminal 86, then test the following
terminal combinations.
Test
Desired result
terminal 87 to 87a and 30
no continuity
(infinite
Ω)
terminal 87 to 30
continuity
(zero
Ω)
•
terminal no. 87a - N.C.
•
terminal no. 85 - coil negative (-)
•
terminal no. 30 - common
•
terminal no. 86 - coil positive (+)
•
terminal no. 87 - N.O.
Control Relay Schematic
Summary of Contents for S-80
Page 16: ......
Page 76: ...Service and Repair Manual October 2016 Manifolds 60 S 80 S 85 S 80X Part No 1269074 ...
Page 86: ...Service and Repair Manual October 2016 Manifolds 70 S 80 S 85 S 80X Part No 1269074 ...
Page 144: ...Service and Repair Manual October 2016 128 Continental TME27 Engine Harness ...
Page 147: ...October 2016 Service and Repair Manual 131 S 80X Ground Control Box Wiring Diagram ...
Page 148: ...Service and Repair Manual October 2016 132 Deutz TD2 9 L4 Engine Harness ...
Page 151: ...October 2016 Service and Repair Manual 135 Perkins 404F 22T Engine Harness ...
Page 289: ...October 2016 Service and Repair Manual 273 Continental Options Schematic ...
Page 292: ...Service and Repair Manual October 2016 276 Deutz and Perkins Options Schematic ...
Page 293: ...October 2016 Service and Repair Manual 277 Platform Level Cutout CTE Option ...
Page 296: ...Service and Repair Manual October 2016 280 12 kW Hydraulic Generator Wiring Diagram ...
Page 297: ...October 2016 Service and Repair Manual 281 12 kW Hydraulic Generator Electrical Schematic ...
Page 300: ...Service and Repair Manual October 2016 284 Belt Driven Generator Option ...
Page 301: ...October 2016 Service and Repair Manual 285 Hydraulic Schematic 2WD Models ...
Page 305: ......