Needs to be wire ended, surface mount pads have burnt away. Physically not much bigger than a 1N4148 (got plenty of others with higher rating).
Reg i/p draws 2.5ma on first, and 36ma on second. Think max rating for each is 100ma o/p (not clear from spec, says "in excess of 100ma", but no max quoted.
Not checked reg o/p circuitry yet, but without harness plugs connected, can't guess at working load. Will check for pcb bulbs, but if 100ma is max?
36v ok for regs, but pushing it for 35v caps, tractor pcb from 1998, modern lower voltage VDRs may be physically smaller?
Will try to post a pic, but the light angle is critical to read anything much.
Possibly were larger back then. Just been talking to a colleague who has messed around with things like this before and he said load dumping can cause voltages in the 20V region. So I think you might be looking for a varistor in the 27V~30V area.
How about a 1N4007 or 1N4004 diode, everyone has those lying about. There will be some inrush current.