97 GULFSTREAM DEISEL wiring prob

[chipstalk]

under the dash are two pairs of wires marked TUB1/RMF1 & LTR1/RMF they both terminate with a rubber piece which has a male female cap pugged into them. the TUB1/RMF1 pair has melted and it appears in the melted cap there is a diode or some type of component. both wires test hot. gulfsteam doesn't have a wiring diagram and befor i start following wires or hire a wire follower does anyone have an idea what TUB1/RMF1 are for or knows where i might get a wiring diagram for 97 deisel pusher.

thanks