texasfishingforum.com logo
Main Menu
Advertisement
Affiliates
Advertisement
Newest Members
Serang, samhan, mistermike650, Buster_Brown, gofish42189
109286 Registered Users
Top Posters(All Time)
TexDawg 90,121
hopalong 78,912
Pilothawk 77,543
John175® 69,852
JDavis7873® 67,393
Derek 🐝 61,690
Tritonman 58,396
LoneStarSon® 54,816
Mark Perry 54,805
facebook
Forum Statistics
Forums60
Topics777,301
Posts13,002,489
Members109,286
Most Online36,273
Jan 23rd, 2013
Print Thread
General wiring question #12711241
04/10/18 11:29 PM
04/10/18 11:29 PM
Joined: Apr 2005
Posts: 532
Justin, TX
D
DanH Offline OP
Pro Angler
DanH  Offline OP
Pro Angler
D

Joined: Apr 2005
Posts: 532
Justin, TX
So I'm trying to fix the rats nest on this '87 sun tracker, 35hp Merc.

Can anyone explain to me how a boat is typically wired? Starting from the very beginning, there are two heavy gauge wires that feed into the engine cowling, one positive, one negative. I found a fuse in the cowling on the positive side. From there it is housed in a wire harness with all the other ignition controls up to the console. So now in the console that red positive wire is always hot. Should I be using that wire to power running lights, etc.? Or should I run another positive and negative wire to a fused wiring terminal in the console and power it that way so it doesn’t run through whatever electronics are in the motor?

So it basically boils down to this, should all of the regular boat electronics run on the single positive wire coming from the wiring harness, or should I run a separate wire to a fuse panel, and power the running lights, depth finder, etc.?

Re: General wiring question [Re: DanH] #12711600
04/11/18 06:36 AM
04/11/18 06:36 AM
Joined: Mar 2003
Posts: 1,292
Cisco,tx
scruboak Offline
Extreme Angler
scruboak  Offline
Extreme Angler

Joined: Mar 2003
Posts: 1,292
Cisco,tx
lights should be on there on circuit and so on .Less problems running down problems later .

Last edited by scruboak; 04/11/18 06:37 AM.
Re: General wiring question [Re: DanH] #12711666
04/11/18 11:53 AM
04/11/18 11:53 AM
Joined: Jun 2017
Posts: 322
cedar hill tx.
sae Offline
Angler
sae  Offline
Angler

Joined: Jun 2017
Posts: 322
cedar hill tx.
The boat I bought had a 2 or 3 owners and the repairs were a mess. I mounted 2 fuse blocks ( 4 each)under the console
easy to
accses .I mounted acommon ground lug .All gauges and such have a fuse to match the load and all black wires are on the same
post.

Re: General wiring question [Re: DanH] #12711768
04/11/18 01:41 PM
04/11/18 01:41 PM
Joined: Jul 2007
Posts: 584
Lufkin, TX
A
A draper Offline
Pro Angler
A draper  Offline
Pro Angler
A

Joined: Jul 2007
Posts: 584
Lufkin, TX
I found this site helpful.

wiring a boat

Re: General wiring question [Re: DanH] #12713499
04/12/18 04:43 PM
04/12/18 04:43 PM
Joined: Dec 2003
Posts: 3,167
Arlington, TX
2
2-stroke Offline
TFF Team Angler
2-stroke  Offline
TFF Team Angler
2

Joined: Dec 2003
Posts: 3,167
Arlington, TX
Rewiring your boat is a real labor of love, but there's lots worse ways to spend a weekend. For sure keep your accessory wiring separate from the engine wiring harness, and for sure use fuses.

Purple wire coming from the keyswitch usually supplies 12V for accessories (only powered when the switch is "ON"). The only thing I have on there is the tach. Everything else (lights, pumps, horn) is just like sae said - powered through a fuse box wired directly to battery, and common ground bus bar.



Re: General wiring question [Re: DanH] #12713908
04/12/18 09:13 PM
04/12/18 09:13 PM
Joined: Feb 2006
Posts: 363
Texas
Alumacraft 14 Online content
Angler
Alumacraft 14  Online Content
Angler

Joined: Feb 2006
Posts: 363
Texas
Take pictures, lots of them before disconnecting. Can save your butt.

Re: General wiring question [Re: DanH] #12714830
04/13/18 02:08 PM
04/13/18 02:08 PM
Joined: May 2003
Posts: 11,496
Littlefield Tx & Lake A. H. US...
gary purdy Offline
TFF Guru
gary purdy  Offline
TFF Guru

Joined: May 2003
Posts: 11,496
Littlefield Tx & Lake A. H. US...
Stay with boating industry standard wire colors for the different systems. The labels and tags will fade or fall off.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: General wiring question [Re: DanH] #12715453
04/13/18 08:24 PM
04/13/18 08:24 PM
Joined: Aug 2011
Posts: 2,845
Austin, Tx
B
Bob Landry Offline
Extreme Angler
Bob Landry  Offline
Extreme Angler
B

Joined: Aug 2011
Posts: 2,845
Austin, Tx
Also, use AWG tinned wire and not the SAE stuff from Home Depot or the auto parts stores. Size for size, the SAE wire is 12-18% smaller and will handle less current with more voltage drop. There are wire sizing charts all over the internet. Download one of them. Select your wire size for a 3% drop and when calculating distance of wire runs don't foeget to figure in the length for the return neg wire.


2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2018 Robalo R180 CC, Yamaha 115

Bitter Gun Owner
Bitter Clinger
Armed Infidel
Previous Thread
Index
Next Thread


© 1998-2018 OUTDOOR SITES NETWORK all rights reserved USA and Worldwide
UBB.threads™ 7.6.2