1988 Mariah Supra

[alex123]

I have a 1988 Mariah Supra that is going to need some work. I am having some electrical issues with it and was wondering if anyone had, or knew where I can find, a copy of the owners manual and/or a wiring diagram for the boat. Also any other information would be greatly appreciated.
Thanks!

[chris young]

The wiring diagrams are notoriously aweful for these boats but this should get you started. Go to http://www.supraboats.com/downloads/ then select "1990 20-23' owners manual" in the drop down box. Scroll down through the doc, the wiring diagram is on page 79. Yours may not be exactly the same but it should be pretty close. You can also check the comp and conbrio document as well. (it's worse)

What problems are you having?