Electrical Oddity...

For a long time I've noticed that my blower seems to draw way too much power. There are a lot of times when the engine will barely turn over while the blower is on, but if I shut the blower down it cranks right up. The voltage gauge drops from 13 to 11-12 if you turn the blower on while the engine is running.

Last night I noticed that when I turned on my Navigation lights (green/red on the bow) the voltage on the gauge dropped from 13v to around 9v. The weirdest thing is that simultaneously the oil pressure and temp gauges went up roughly 20 points each. So, oil pressure went from around 50 psi to 70 psi and temp went from around 160 degrees to 180 degrees if my memory serves me correctly. Clicking the navigation light button on and off caused an instantaneous jump, so obviously oil pressure and temp were not actually changing as indicated by my gauges.

What could cause this? I have a multimeter and will be glad to do any diagnostics that I can to, but I don't even know where to start with a weird electrical problem such as this.

Here's how I added a new groundon my direct drive.

Yours would most likely just need a longer wire unless you wanted to run it right to the battery instead of the engine block.

TX is correct that you want to run a new positive as well. Although, for that you do need to understand the circuit a little more fully. The ground side is a little easier. Running the ground only made mine about 90% better though.

If Dylan is half as helpful with the electrical part as he was with the engine part you should have no problems.

The stereo shouldn't be drawing anything from the dash. Maybe just the breaker that turns on the deck, (acc breaker) amps should be powered straight from the batteries. If you can't find a thread about this et me know and I'll send you some pics from my Excel.