My car 1985 300SD 300K

Ticking noise coming from the area around spin on fuel fliter. Only occurs when the key is turned to the glow plug position. Car starts easily and runs fine. Can't hear the noise after car started. Just got back from a 600 mile round trip and car ran fine. Anyone have any ideas of the cause of the ticking noise? Any help greatly appreciated.

Thanks

... sounds like it's in the glow plug relay. pull the glow harness off the relay and see if the ticking continues. then unhook the control harness and see if it does, then just start listening to the car with a broom handle for the origin of the noise.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Cruise control actuator can tick. Put your hand on it and see if you can feel it.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

My cruise has never worked since I've owned it. Would it start giving me problems like this now?

Mine doesn't work either but if it's turned on it will tick.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Can you tell me where the glow plug relay and harness are located?
Thanks

I'll also try to turn it off, I guess I could have turned it on by accident.

Thanks

Just follow the electrical connections that are attached to the glow plugs. You'll find the relay in a short time. It is typically a moderate sized black box.

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1982 240D, sold 9/17/2008
1987 300D TurboW124.133 - 603.960, 722.317 - Smoke Silver Metallic / Medium Red (702/177), acquired 8/15/2009
262,715 and counting

Put your hand on the actuator first to see if that is where the sound is coming from.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Well I went out to troubleshoot the car and now it is not doing it anymore. Anything I should check or be concerned about? Or do I just wait until it does it again?

The noise started again and I pinpointed it to the VDO cruise control box above the spin on fuel filter. Pulled the box's power supply cord and problem solved. Thanks to everyone for the help.