Jeeper  Adventures Under the Hood  Jeeper

Pre-1983 Ignition

Here are diagrams showing the difference between the pre- and post-1983 ignition systems.

(Click the diagrams for more)

Factory Setup Computer Bypassed
1983 and after. The pre-1983 installation is much the same, but without a computer.

I'm told that the wiring on a YJ is the same, except for one difference in wire color --- The wire from MCU harness terminal #47, going through the firewall to the connector at the ignition module, is orange on my CJ, but is light-green on a YJ.

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