early to late harness compatability

[evandael]

i have an 87is. the harness is fubared from a fire.

can i swap in a late model chassis harness and get it running? i forsee the ECU and engine harness connectors being incompatible.

however, if I intend to swap in an M50tu, would this be compatible? or should i continue to search for an 87is harness?

[jlevie]

If you use a harness from a 9/87 or later you will have to modify the harness slightly. There is a three pin connector on your 87 harness that supplies the START signal to the DME and feeds the tach and econometer signals to the cluster. On a late harness those are routed through C101. You can salvage the connector from your 87 harness and splice it in to the new harness.