Service and Repair Manual
April 2018
Manifolds
62
GTH-1056
Part No. 1287211GT
How to Test a Coil Diode
Properly functioning coil diodes protect the
electrical circuit by suppressing voltage spikes.
Voltage spikes naturally occur within a function
circuit following the interruption of electrical current
to a coil. Faulty diodes can fail to protect the
electrical system, resulting in a tripped circuit
breaker or component damage.
Electrocution/burn hazard.
Contact with electrically charged
circuits could result in death or
serious injury. Remove all rings,
watches and other jewelry.
1 Test the coil for resistance. Refer to Repair
Procedure,
How to Test a Coil
.
2 Connect a 10W resistor to the negative
terminal of a known good 9V DC battery.
Connect the other end of the resistor to a
terminal on the coil.
Resistor 10Ω
Genie part number 27287
Note: The battery should read 9V DC or more when
measured across the terminals.
1 multimeter
2 9v DC battery
3
10Ω resistor
4 coil
Note: Dotted lines in illustration indicate a reversed
connection as specified in step 6.
3 Set a multimeter to read DC current.
Note: The multimeter, when set to read DC current,
should be capable of reading up to 800 mA.
4 Connect the negative lead to the other
terminal on the coil.
5 Momentarily connect the positive lead from
the multimeter to the positive terminal on the
9V DC battery. Note and record the current
reading.
6 At the battery or coil terminals, reverse the
connections. Note and record the current
reading.
Result: Both current readings are greater than
0 mA and are different by a minimum of 20%.
The coil is good.
Result: If one or both of the current readings
are 0 mA, or if the two current readings do not
differ by a minimum of 20%, the coil and/or its
internal diode are faulty and the coil should be
replaced.
Summary of Contents for Genie GTH1056
Page 63: ...April 2018 Service and Repair Manual Manifolds Part No 1287211GT GTH 1056 53 ...
Page 65: ...April 2018 Service and Repair Manual Manifolds Part No 1287211GT GTH 1056 55 ...
Page 115: ...April 2018 Service and Repair Manual 105 Harness Map Harness Legend ...
Page 118: ...Service and Repair Manual April 2018 108 Harness Map Control System Electronic Joystick ...
Page 119: ...April 2018 Service and Repair Manual 109 Harness Map Deutz T4F Engine ...
Page 122: ...Service and Repair Manual April 2018 112 Harness Map Deutz T3 Engine ...
Page 123: ...April 2018 Service and Repair Manual 113 Harness Map Perkins T4i Engine ...
Page 126: ...Service and Repair Manual April 2018 116 Harness Map Perkins T3 Engine ...
Page 127: ...April 2018 Service and Repair Manual 117 Harness Map Road Lights ...
Page 128: ...Service and Repair Manual April 2018 118 GTH 1056 Part No 1287211GT Harness Map Road Lights ...
Page 129: ...April 2018 Service and Repair Manual Part No 1287211GT GTH 1056 119 Harness Map Work Lights ...
Page 130: ...Service and Repair Manual April 2018 120 Harness Map Work Lights ...
Page 131: ...April 2018 Service and Repair Manual 121 Harness Map Deutz HVAC Option ...
Page 134: ...Service and Repair Manual April 2018 124 Harness Map Perkins HVAC Option ...
Page 135: ...April 2018 Service and Repair Manual 125 Harness Map Enclosed Cab Heater ...
Page 138: ...Service and Repair Manual April 2018 128 Harness Map Proximity Sensor Beacon Lockout Options ...
Page 139: ...April 2018 Service and Repair Manual 129 Electrical Schematic View 1 ...
Page 142: ...Service and Repair Manual April 2018 132 Electrical Schematic View 2 ...
Page 143: ...April 2018 Service and Repair Manual 133 Electrical Schematic Deutz T4F Eng Harness ...
Page 146: ...Service and Repair Manual April 2018 136 Electrical Schematic Deutz T4F Eng Harness ...
Page 147: ...April 2018 Service and Repair Manual 137 Electrical Schematic Deutz T4F Eng Harness ...
Page 150: ...Service and Repair Manual April 2018 140 Electrical Schematic Deutz T3 Eng Harness ...
Page 151: ...April 2018 Service and Repair Manual 141 Hydraulic Schematic ...
Page 152: ...Service and Repair Manual April 2018 142 GTH 1056 Part No 1287211GT Hydraulic Schematic ...
Page 153: ...April 2018 Service and Repair Manual Part No 1287211GT GTH 1056 143 Hydraulic Schematic ...
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