glow plugs not working 455

[james scott]

just serviced tractor change oil and air filter and blew off buildup of dust and now glow plugs not working no light and plugs not working any sugestions on what happen

 

[Tx Jim]

loose wire from compressed air???????

 

[atschirner]

Engine warm and no glow plug cycle needed? Glow plug controller doesn't function if the module is above 104 Degrees F.

My following post is the troubleshooting steps for a late model, 70001 or later, 455.

Hope this helps you, Alan

 

[atschirner]

CIRCUIT OPERATION AND DIAGNOSIS?55 ELECTRICAL
GLOW PLUG AND LIGHT CIRCUIT
DIAGNOSIS?55 (S.N. 070001 )
Test Conditions:
Transmission in neutral.
PTO switch off position.
Park brake engaged.
Key switch in off position.
Meter negative (? lead on battery negative (?
terminal.
Meter positive (+) lead on numbered test point.
Check connection for corrosion and loose terminals
when testing.
Test Conditions:
Key switch in off position.
Test Conditions:
Key switch in run position.
Glow plug and light timer in the diesel module are
activated when the air temperature is below 40ｰC
(104ｰF). If necessary, refrigerate module to
reduce temperature before testing.
Test/Check Point Normal If Not Normal
1. Battery positive terminal. 11.8?3.2 volts. Test battery.
2. Key switch power connector. Battery voltage. Check power circuit test points.
3. Control/fuse module terminal
6.
Battery voltage. Check F6 power fuse. If fuse ok,
replace control/fuse module.
4. Diesel module connector X13. Battery voltage. Check power circuit test points.
5. Instrument panel terminal 14. Battery voltage. Check 503 yel wire.
Test/Check Point Normal If Not Normal
6. Engine ground. Maximum 0.1 ohms resistance. Check battery negative cable and
engine ground connection.
7. Diesel module connector X11. Maximum 0.1 ohms resistance. Check 180 and 100 blk wire.
Test/Check Point Normal If Not Normal
8. Diesel module connector X12. Battery voltage for up to 45 seconds. Replace diesel module.
9. Glow plugs. Battery voltage for up to 45 seconds. Check 780, 781, and 784 red/wht
wires. If wires are ok and glow
plugs do not operate, replace glow
plugs.
10. Instrument panel. 0.0?.2 volts for up to 20 seconds,
battery voltage after timer deenergizes.
Greater than 0.2 volts佑heck 783
gry wire. If wire is OK, replace
diesel module.
0.0 volts幼heck glow plug lamp