Hi all this is my first post here. I'm new to Grady and Yamaha. I had always been OMC till now. I had picked up a '90 23' Gulfstream w/twin 150 Yammys that was a victim of Hurricane Sandy. It didn't take much to get her back in shape but she still has a few issues. Most of them electrical. One issue I need to solve is with power to the Furuno radar display. I was wondering if someone out there knows where the power leads tie into the system. I've been able to trace them down from the hard top to just before the helm. From there it's a wiring nightmare and I loose sight of them. Havn't been on the boat since the Fall but if memory serves correctly it's the heavy red w/white stripe and black or black w/white stripe. If anyone can help me out I would greatly appreciate it.
Furunro radar easy elecrical question
- Thread starter ipmarine
- Start date
Is the radar original? If so, you might be able to get a wiring diagram from Grady. But, "X" number of previous owners means, quite often, a challenge (to say the least) when tracking down electrical gremlins. Often times, it's best to just start over.
Other than that, use an Ohm meter to find the wires by hooking up to the radar and then individual wires at the dash - remove the fuses for the power wires (or remove completely) and remove the ground wires completely to check. Also, disconnect your batteries completely.
But, if you've traced them to near the helm, it shouldn't be too hard. Just continue your trace and start by looking for the same color wires at a fuse panel and ground bus bar.
Other than that, use an Ohm meter to find the wires by hooking up to the radar and then individual wires at the dash - remove the fuses for the power wires (or remove completely) and remove the ground wires completely to check. Also, disconnect your batteries completely.
But, if you've traced them to near the helm, it shouldn't be too hard. Just continue your trace and start by looking for the same color wires at a fuse panel and ground bus bar.
Thanks for the reply DennisG01, It is the original radar with a 1621mk2 display. I'm changing that out to a 1622 display due to corroded and broken pins on the "board side" connectors of the 1621. Anyway,I had pulled the removable panels from around the helm took one look and just shook my head. The only fuse block I found was up in the console alongside the back of the key switches. Between the location & harnesses pretty much the only way to view what's connected is with a flashlight and a mirror (good job Grady design engineers).
I guess I may have to just bite the bullet and find a suitable 12v source and splice some new wire to the old. Hate to do that though but it may be my only choice.
Here's a few of the other elect. issues I'll be attending to this spring.
Portside motor trim indicator not working. (test, repair or replace).
portside flowscan not reading. (probably the sensor)
cleaning contacts on the wiper motors then retesting.
Now all I need is some decent weather.
I guess I may have to just bite the bullet and find a suitable 12v source and splice some new wire to the old. Hate to do that though but it may be my only choice.
Here's a few of the other elect. issues I'll be attending to this spring.
Portside motor trim indicator not working. (test, repair or replace).
portside flowscan not reading. (probably the sensor)
cleaning contacts on the wiper motors then retesting.
Now all I need is some decent weather.
"Thanks Grady"... It's not just Grady - it's just the name of the game. Welcome to world of working on boats! 
Often times, most of the wire harnesses are installed before major components of the boat are put together. Getting to stuff afterwards is usually a chore. Ever try to access wires underneath the dashboard of a car?
You've got a couple things that you're fighting. First, is the multitude of previous owners and who knows what they've done or redone over the years. Second, and likely a big factor, is that you're dealing with the after-effects of a Sandy boat. You can have corrosion working it's way INSIDE the wires, not just on the connectors. I hate to say it, but if it was my boat... I'd would gut the electrical and run all new wires. Otherwise you'll likely be chasing gremlins for years and years. I know it's easy for me to say this from behind a keyboard (although I have done it), but you sure don't want to be dealing with electrical issues 20 miles from nowhere. Heck, you don't want to be dealing with them 1/2 mile from somewhere! Granted, even "new" stuff can have problems, but having new harnesses sure does cut down the chances!
Often times, most of the wire harnesses are installed before major components of the boat are put together. Getting to stuff afterwards is usually a chore. Ever try to access wires underneath the dashboard of a car?You've got a couple things that you're fighting. First, is the multitude of previous owners and who knows what they've done or redone over the years. Second, and likely a big factor, is that you're dealing with the after-effects of a Sandy boat. You can have corrosion working it's way INSIDE the wires, not just on the connectors. I hate to say it, but if it was my boat... I'd would gut the electrical and run all new wires. Otherwise you'll likely be chasing gremlins for years and years. I know it's easy for me to say this from behind a keyboard (although I have done it), but you sure don't want to be dealing with electrical issues 20 miles from nowhere. Heck, you don't want to be dealing with them 1/2 mile from somewhere! Granted, even "new" stuff can have problems, but having new harnesses sure does cut down the chances!
I do know what you mean DennisG01, I've been in the trade for some 20 yrs now doing 'glass and paint repairs. I've worked on everything from Nor-Techs & MTIs to Silverton, Vikings and almost everything in between. Replaced stringers, recored transoms & decks and all that but when it comes to my own stuff anytime I can save a little time (cause free time in the spring,summer & fall is so limited) gives me more time to enjoy and I have to admit I get a wee bit tired of working on boats. So I was hoping someone out there might be able to give me a little assist. Have a great summer !