1988 Toyota 4Runner OE Wiring Harnesses & Stereo Adapters Jan 12, 2017Toyota 4Runner 1988, Aftermarket Radio Wiring Harness by Beat-Sonic®, with OEM Plug. Includes 10-Pin and 6-Pin Stereo Connectors. Stereo wiring harness for vehicles without factory amplifier systems. Focused on innovation and quality,.. Wiring harness | Toyota 4Runner Forum [4Runners] May 31, 2019Participate in all 4Runner discussion topics; 1984,1988 re None. Can anyone tell me if I can use my 88re wiring harness inside and engine compartment and convert to an Rte? Thanks Joesomeone, May 30, 2019 #1. May 31, 2019 at 6:26 AM #2 #2.