i need a wiring diagram for a 84 300sd. more specifically i need it for the starter side. i found a couple forms that have been helpful. but i know its not the ignition switch or fuse or starter its self. but i do need to find the signal side of things so i don't have to start my car by jumping the starter. if anyone else has any ideas on how to figure this problem out it would be greatly appropriated.

What is the problem?

the car started yesterday but didnt start when i just tryed it. i know its not the lock and tubler along with the ignition switch because i just replaced those last week. i found someone that said the jump to the starter siloniod so i did and the starter cranked. so all i know is that the problem is somewhere between the silnoid and ignition switch. if i could get the pin info for the ignition switch that would help too.

Did you replace the electrical portion of the ignition switch? Jumping terminals 1 and 3 in the junction box on the right inner fender just outboard of the alternator should energize the starter.

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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

& that may also suggest the inhibitor switch (neutral safety switch) on the trans is the problem.
Have you tried jiggling the trans leaver around or trying in N instead of P to see if the starter comes to life?

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving