Edelbrock Pro-Tuner, User Manual

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34
Figure 12
To mount the ECM or PCM inside the vehicle, a hole will have to be made in the firewall
for the harness and connectors to pass through. A firewall bulkhead grommet and cover
plate is included to seal the hole and support the harness where it passes through the
firewall, or you can make your own.
1. To run the harness into the passenger compartment, select the appropriate
location for the harness to pass through for your vehicle – making sure you have
access from the inside of the vehicle and that no components are in the way or can
be damaged during the process.
2. Use the grommet and cover plate assembly as a template. Mark the outline on the
firewall. - Using a hole saw, nibbler, or chassis punch, create a 2” x 2-3/8”
rectangular hole in the firewall – being sure to center the hole in the template
outline. De-burr all edges when finished.
3. Carefully work the harness through the firewall, passing the 32 pin (PCM only)
connector through first, followed by the other connectors. The ECU connector
covers may need to be temporarily removed in some cases to get them through
easily. - Install the firewall plate with the screws provided by slicing the O-ring and
wrapping it around the main harness bundle. Slide each side over the grommet
and harness until the mounting holes line up as in figure 8. Fasten to the firewall.
Use of a silicone sealant between the plate and the firewall is optional. See Figure
13.