where is the relay on a 115?

__________________
1985 300D cali 190K

http://mercedes.thatchermathias.com/mw300d.jpg

The relay is under the dash on my car, just like it is on the early w123's. I just can't find the fuse.

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

I believe there is no fuse on your system, power goes through #1 fuse (30 amp)
to the timer relay,glow plugs hooked in series.

Attached Thumbnails

 

__________________
1986 190D 5 cyl. 5 speed manual White (215K),
1983 300SD Silver blue (103K)

hmmm, it seem like there has to be a fuse in the system though.

So I wonder why I can only power 3 plugs at the time. If I hook up all 5 NONE of them get power.

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

this is going to sound stupid but

did you follow the directions?

directions? I hooked up the glowplugs just like they're supposed to be.

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

According to this old thread . . . Relay & Fuse post #7 says in part . . . The circuit loops through the double fuse block located in the engine compartment on the drivers side with two 16 amp fuses . . .

Edit to add:
Also found an older thread . . . glow plug which in part says in post #3 There are 4 glow plugs, wired in series. If one burns out, none of them will work. If the glow light on the dashboard never glows, a burned out glowplug is a likely cause.

The fuse block is located under the hood on the drivers side near the firewall. It's under a cover held by 2 thumbscrews.

And post #4 There may be an 80 A fuse on the firewall, held down by two thumbscrews (if the GP are operated by the key -- if by the start knob, not there). These can crack, leading to no glowplugs.

__________________
82 240D Manual 277K and still rolling!
02 Volvo S60 AWD For Sale

Originally they are wired in series and the new way of doing it is in parallel in case one goes out they all wont go out.

That thread concerns a gorilla knob system. The one in question in this thread is a keyed relay system.

__________________
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

I just check each litle box under my hood. I removed the fuses from each box and the turned the key and the relay clicked each time, so im guessing those little boxes aren't tied to the glowplugs.

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

True, but the system 'looks like' it is wired in series since the wires jump from one plug to the next. It doesn't look like the OE pencil plug system with a separate wire from the relay for each plug. The original series wire gives voltage to the plug near the firewall and wires jumping from that plug to each in turn energize the others.

__________________
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

yes I made 10 gauge jumper wires.

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

OK, my mistake . . . how about what I added (edited) to my post after you read that one thread?

__________________
82 240D Manual 277K and still rolling!
02 Volvo S60 AWD For Sale

That other thread references a fuse on the firewall like the 123 models but apparently according to both the OP and the wiring diagram, there is no such fuse on the 115 300d keyed relay system. Fuse must be elsewhere. Have no idea where.
Very odd that it was carrying enough current for loop plugs but doesn't function with pencil plugs.

__________________
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

Maybe its behind the gauge cluster, i'll pull it tomorrow.

Surely this system has to be fused.

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg