Hummingbird 580 not turning on - Kayak Fishing Adventures on Big Water’s Edge

YakDout · 05-29-2016, 09:47 AM

Quote:

Originally Posted by supaboy1981

Getting 12.47 on the voltmeter same at the terminal connectors and the at the head unit power attachment .9. There is a 2 fuse on the power line. So the unit has power. I'm guessing it's just the head unit. I tried to take it apart to see inside but I don't have a hex bolt that size and it's stripped just enough so my Allen doesn't turn it. Anybody have a lead on a compatible head unit?

Sent from my Nexus 6 using Tapatalk

Sounds like you are losing power in the wiring somewhere. Wires corroded? Good connections. Someone correct me if I am wrong but the .9 volts you are getting at the head unit should be close to the same as at the battery, no?

YOYOYaker · 05-29-2016, 02:47 PM

Try probing with the voltmeter with both probes at 2 different points along the same conductor path. For instance, neg. probe on one side of the fuse, pos. probe on the other side of fuse. When checking like this, on volts scale, you want to see very small to no voltage. When you see more than a volt, the problem lies between the two points just checked. What you are doing with this is looking for a voltage drop between the two points. Since you are checking conductors, there should not be a a drop (indicating resistance there). When doing this, everything needs to be connected, including the battery. Hope this helps.

FullFlavorPike · 05-29-2016, 03:51 PM

I would just rewire it and see if the problem goes away. If it does, it was definitely the wiring. If it doesn't, it wasn't. No guessing. Troubleshooting with binary options can be good that way.

tomahawk · 05-29-2016, 05:24 PM

0.9 volts at connector = bad wire harness
are you sure the volt meter is making good contact at the connector?
if so, the problem can either be:
1. bad fuse
2. broken wire
3. bad connection
I wouldn't send the unit back until I was getting the correct voltage at the connector.

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode

05-29-2016, 02:47 PM	#2
YOYOYaker Junior Join Date: Nov 2015 Location: San Marcos, CA Posts: 28	Try probing with the voltmeter with both probes at 2 different points along the same conductor path. For instance, neg. probe on one side of the fuse, pos. probe on the other side of fuse. When checking like this, on volts scale, you want to see very small to no voltage. When you see more than a volt, the problem lies between the two points just checked. What you are doing with this is looking for a voltage drop between the two points. Since you are checking conductors, there should not be a a drop (indicating resistance there). When doing this, everything needs to be connected, including the battery. Hope this helps.

05-29-2016, 03:51 PM	#3
FullFlavorPike Senior Member Join Date: Feb 2016 Location: San Diego, CA Posts: 811	I would just rewire it and see if the problem goes away. If it does, it was definitely the wiring. If it doesn't, it wasn't. No guessing. Troubleshooting with binary options can be good that way.

05-29-2016, 05:24 PM	#4
tomahawk Senior Member Join Date: Aug 2012 Posts: 109	0.9 volts at connector = bad wire harness are you sure the volt meter is making good contact at the connector? if so, the problem can either be: 1. bad fuse 2. broken wire 3. bad connection I wouldn't send the unit back until I was getting the correct voltage at the connector.