Electronics, Electronics not working

[jolymon]

I'm looking at a 1993 Grady Adventure and the broker is telling me none of the electronics is working although the motor runs fine. What should be the first thing to look for to resolve this problem. Not much of tracing down electrical problems.

[barch97]

"the first thing"= Is there power? Is there a battery? Is it charged? Is it connected? Are there any wires that look like they ought to be connected but are not (perhaps a larger 10/12 ga wire that appears to run forward to a fuse panel)?

Next = Condition of the battery terminals and wire ends/connections. Is everything clean and tight?

Next = Connections at fuse panel, similar to battery, is everything clean and tight? Any missing or blown fuses? Any wires that look like they ought to be connected but are not? Any exposed copper wire that may come in contact with other metal?

*Note: A test light would be a very handy thing to bring along.

Next = Connections at each unit, again is everything clean and tight?

If you can verify that there's power getting all the way to each unit but they won't power up, take the head units to a marine electronics retailer and ask them to bench test for you. In most places this is a free service although thoroughness does vary.

You can download a copy of your owner's manual from grady's website. This will include wiring diagrams. They may be very helpful in the event you need to replace any wiring.