Using an electronic speedo with TBI and 700R4?

[clinebarger]

Originally Posted by mcbassin

Any ideas of what wires beside ground, cluster and vss signal that must be connected?

Here is the 91 Suburban diagram from my good friend Cableguy:

C11 of the DRAC will go to the A10 terminal on the 24 pin connector of the ECM (curcuit #437, wire color-brown), This is needed for TCC, EGR & IAC functions.

C9 of the DRAC will need to be hooked to a ignition hot (curcuit #50, wire color-brown)