1990 Jeep Wrangler Wiring Diagram - Chanish 1990 Jeep Wrangler Wiring Diagram. February 12, 2019. 93 Jeep Wiring Diagram . 93 jeep wiring diagram 37oturn. Headlight Wiring For 1994 Jeep Wrangler . Headlight wiring for 1994 jeep wrangler 104oppweiss. 1989 Jeep Wrangler 4.2 Ecm Wiring Diagram 1989 Jeep Wrangler 4.2 Ecm Wiring Diagram. So i recently ran into some electrical trouble on my 89 YJ and in the through multiple pages to track a wire while shins deep in an engine bay. Diagrams needed are for Yj wranglers only and should be posted under the Yj 87'' engine electrical wiring diagram YJ Wrangler. ASSEMBLY ().