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ContinuousWave: Whaler Repairs/Mods
Diagnosing gauge malfunction
|Author||Topic: Diagnosing gauge malfunction|
posted 09-14-2003 08:20 PM ET (US)
I recently replaced all of my corroded gauges with new Honda gauges. When I was through with the installation everything on the starboard side worked perfectly...and nothing on the port side did. I've checked the wiring and there are no errors. I have power at the wiring harness.
What would you guys suggest as the next in the series of diagnostic steps?
posted 09-14-2003 08:46 PM ET (US)
Are there dual engines? Dual batteries?
Bond the negative terminal of the batteries together. Try a jumper cable to test. This might part of the problem with electrically operated gauges.
posted 09-14-2003 08:52 PM ET (US)
Any fuses in the line?
posted 09-14-2003 11:51 PM ET (US)
I have twin engines, each with dual batteries (for a total of four batteries). The batteries for each motor share a common ground; they're hooked up to a Perko "1,2,all,off" switch. I believe the battery confguration is the same as it was when the other gauges were in place and functioning properly, but perhaps I failed to reconnect the common ground from one PAIR to the other. Is that what you think I should do Jim?
Should I bond the ground terminals for one pair to the other? I don't undstand why that should be necessary. Shouldn't the function properly as two completely independent systems?
posted 09-15-2003 07:56 AM ET (US)
My guess is that the positive voltage being supplied to the set of gauges that does not work is from the wrong battery.
Those gauges would not have a ground reference for the 12-volts.
It is just a guess. You can test this theory in ten seconds by connecting a jumper cable between the battery negatives.
Four batteries? How big is this Boston Whaler boat?
posted 09-15-2003 12:56 PM ET (US)
You can NEVER have too many batteries, bullets or beer.
posted 09-15-2003 01:38 PM ET (US)
Jim, thank you for your suggestion. I'll try it when I get home tonight.
To answer your question, I have a 22' Outrage w/ whaler drive and twin Honda 115/130s. I have a pair of group 24s in the transom storage area and a pair of group 27s in the cooler seat forward of the console. It may be over-kill, but we fish well off the Oregon coast, so I have installed redundant everything. I worry less as a result.
posted 09-15-2003 06:11 PM ET (US)
My experience is that gauges work directly off the pre-wired leads in the engine wiring harnesses (at least that's how it is with Mercury). So if the engine will start, and the gauges are properly wired, those gauges should work. Check the tach, ignition and ground leads, & connections, in the key switch harness.
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