In order to optimize the limited amount of time available to perform tests a special wiring harness was constructed. This harness was built from the IDM connector and IDM wiring harness. Stranded TFFN 16AWG fixture wire was used as the primary conductor. The harness was double checked five different times to ensure that no wires had gotten swapped during assembly. This harness allows easy access to the IDM and a special quick connector for use with the evaluation IDM. All the external IDM signals can be scoped by simply plugging in a connector.

Figure 1-A shows the harness in the wire-nut stage. The wire ends were tinned and wire-nutted just in case of a wiring problem. The harness was double checked then triple checked. After the wiring was superfluously verified the wire-nut version tested on the truck. Later the harness was converted to a more suitable heat shrink version as shown in Figure 1-B and Figure 1-C.

The finished wiring harness is shown in Figure 1-D. The vinyl loom is simply wide temperature 3m vinyl tape. The IDM which was originally relocated behind the fuse/ relay box was once again relocated to the fuse/ relay block support frame as shown in Figure 1-E. This allows easy access to the IDM connector bolt to disconnect the IDM in a speedy manor. The special quick connection used for the evaluation IDM shown in Figure 1-F. Note the size of this connector which should indicate how easily we can interchange factory IDM and evaluation IDM.

This harness has already paid for itself in terms of time saved during tests.