I went wheeling

Sir Sam · 06-20-2021, 08:39 PM

Well you can bypass the fuel pump relay and power the pump directly with a jumper wire.

"no bus" can mean that the gauge cluster isn't making good contact with the dash connector, a pretty common issue that requires reseating the gauge cluster, or tweaking the pins in the connector so it make a better connection.

Or a bad crank position sensor can also cause a "no bus" to show on the cluster.

Or a bad cluster microprocessor would give no bus.

Or a bad ECU.

Or a failure on the CCD bus, the CCD bus runs between the ECU, Cluster, Airbag computer, and SKIM(if equipped). A fault on any of the wiring to and fro could cause it, or an issue in one of those modules.

There is a junction block under the dash that all the CCD bus wires come to, it makes a convenient place to do continuity checks on the CCD wires.

06-20-2021, 08:39 PM	#1
Sir Sam Working Mother Join Date: Mar 2004 Posts: 19,876	Well you can bypass the fuel pump relay and power the pump directly with a jumper wire. "no bus" can mean that the gauge cluster isn't making good contact with the dash connector, a pretty common issue that requires reseating the gauge cluster, or tweaking the pins in the connector so it make a better connection. Or a bad crank position sensor can also cause a "no bus" to show on the cluster. Or a bad cluster microprocessor would give no bus. Or a bad ECU. Or a failure on the CCD bus, the CCD bus runs between the ECU, Cluster, Airbag computer, and SKIM(if equipped). A fault on any of the wiring to and fro could cause it, or an issue in one of those modules. There is a junction block under the dash that all the CCD bus wires come to, it makes a convenient place to do continuity checks on the CCD wires.