I checked the ECM harness per the information above and this is what I came up with, and these readings on the positive points are with the ignition in the "on" position
#'s 5, 6, 30, 55, 80 (Grounds) all measured 5.2 Ohms
#52 Battery 12.26 volts
#75 ECR Relay "on" input .87 volts
#77 Battery 12.26 volts
#94 ECR control 12.25 volts
#99 ECR "on" input .87 volts
#100 ECR "on" input.87 volts
. So it appears the ECR main relay is only transferring.87 to the to the ECR "on" inputs when energized.
I am a bit confused on testing the ECR per instructions as on the diagram page that shows measurements A and B it mentions if "no" then replace with a known good fuel pump relay, so I tested both of the relays per the instructions. Unfortunately the fuel pump relay doesn't have a schematic diagram on it like the ECR does
For the ECR the control pins (85 & 86) are showing 16.2 ohms and the load pins (87a and 30) are showing infinity. With the ignition off there is a constant voltage at both pins 86 and 30.
The FPR the control pins ( the darker bronze pins on the picture) are showing 88 ohms and the load pins (the two lighter gold colored pins) are showing infinity. The only pin on the FPR that has a constant voltage with the ignition off is the bronze pin furthest right. Also, and finally I was unable to locate a ground on the ECR connection at the fuse box with the ignition on or off. My apologies again for the length and thank you
Images (Click to enlarge)
Saturday, July 24th, 2021 AT 8:44 PM