Electrical issue

MASTERBrian

Petty Officer 3rd Class
Joined
Apr 16, 2011
Messages
84
I've been trying to go through this fairly new to me pontoon. The electrical had been worked on a few times over the years, it's a 1990 Sun Tracker Bass Buggy, and had wire nuts, splices, etc.. In any case, I went through it all entirely a few weeks ago, got rid of the wire nuts and soldered & heat shrinked any and all splices. Everything seemed to work fine. At this time, I also added some 12v LED waterproof strip lights to the sides of the hull, put di-electric grease on all joints subject to water, then heat shrink tubed them. I ran the wire and controls up under the console and made the connections to hot and ground at a open spot on the fuse block.
Fast forward to the past few days, I've been out getting my navigation lights wired up nicely and cleaning up those connections as there were still some questionable connections there. I also added an anchor winch, wired straight to the battery. The winch works great and doesn't seem low on power, same goes for tilt/trim on motor, but when I try to turn on my navigation lights, the led lights do strange things and the horn doesn't sound. When I turn off the led lights, the other lights seem dim, where they didn't when I first wired them. The radio, which is on the same fuse block seems to work fine as well.

Does this seem like a low battery or a fault in the wiring somewhere? Turning on the navigation lights dims/resets the LED strip and horn won't blow, but everything else seems fine.

I find it hard to believe a bad connection, as I was very thorough when wiring, but realize things happen. I should also point out this is a brand new deep cycle battery, only had it to the lake once. I believe everything has been off, but maybe there is a phantom drain somewhere, so I installed a ground disconnect at the battery. I also find it hard to believe that the strip lights or anything else would drain it that quick.

Is it possible I need a heavier gauge wire coming from the battery? I believe it is 12gauge, maybe 14 gauge wire. Should I possibly run a separate power wire to the LED Lights?

Trying to get her ready for the fourth, so any feedback is appreciated!
 

bruceb58

Supreme Mariner
Joined
Mar 5, 2006
Messages
30,581
Get some long test leads, put one on your positive battery post and one at the fuse box positive and turn everything on and measure with a meter what your voltage drop is. Do the same thing but do it from negative to negative. In either case, you shouldn't measure more than a 0.5V drop. I am guessing one of those drops will be much more than the other and will tell you where to start looking for your bad connection.
 
Last edited:

MinUph

Chief Petty Officer
Joined
Jun 5, 2011
Messages
466
I agree with a bad connection or short somewhere. Your trim takes a lot of juice and seeing it works fine it more than likely isn't your battery except a possible bad connection to it.
 

MASTER Brian

Senior Chief Petty Officer
Joined
Mar 26, 2006
Messages
738
I messed with it tonight and seem to have narrowed it down to the 8 wire wiring harness plug. Guess I'll try to pick up a new plug tomorrow or just use butt connectors. Thanks for the tips. This might also explain why I seemed to have some issues last trip with the key not turning off the engine a few times.
 

MaPaHa

Petty Officer 1st Class
Joined
Jul 6, 2012
Messages
239
if you have problems turning the engine off, check the ground for sure. If you lose the ground on the kill system watch out because the throttle box and or steering wheel can turn hot and put you on your #@% and make you say bad things. Seriously, it's a dangerous shock.
 

HarborRat

Seaman
Joined
Jan 3, 2014
Messages
51
Sounds to me like some components are trying to pull a ground through the light bulbs. Re-check your wiring.
 

MASTERBrian

Petty Officer 3rd Class
Joined
Apr 16, 2011
Messages
84
I bought a new plug and will switch it over tonight. It was driving me crazy last night, because when I'd pull the gauge cluster out, things would work correctly, putting it back in they'd dim and stop working. I kept trying to play with the wires to see where the issue was, finally tracked it down to the plug, so I'm pretty sure that is the issue! Once I swap it out, I'll know more!

I bought a new ignition switch, but might hold off on replacing it. Kind of thinking this might explain it a bit. Of course, for the $12-15 it cost, I'm not sending it back, so why not replace.....except I'm taking it out in a few day!!
 

MASTERBrian

Petty Officer 3rd Class
Joined
Apr 16, 2011
Messages
84
Got the plug installed last night and lights all seem to work properly, with no dimming. Haven't had chance to mess with ignition switch, but hoping I fixed that issue as well. If not, I suppose it'll have to happen at the lake!!! Shouldn't be a tough fix, just running low on time.
 
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