1990 FLHTP wireing help
1990 FLHTP wireing help
Good evening ladies and gentlemen,
I have a 1990 FLHTP that I am sorting through the wiring after a previous owner "fixed" it. I cannot find a wireing diagram for the controls of all the police stuff and as the PO changed some of the wireing colors I am further lost. Does anybody have a diagram I could look at or explain the wiring?
Also are the turnsignals only supposed to work when the bike is running?
I have a 1990 FLHTP that I am sorting through the wiring after a previous owner "fixed" it. I cannot find a wireing diagram for the controls of all the police stuff and as the PO changed some of the wireing colors I am further lost. Does anybody have a diagram I could look at or explain the wiring?
Also are the turnsignals only supposed to work when the bike is running?
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
I have an '88 FXRP on which I had to do most of the wiring myself.
start with a factory manual and that'll give you wiring diagrams for all the "stock" stuff- then figuring out the extra cop wiring isn;t so hard to figure out- you probably don;t have a siren or pursuit lights, do you?
There is a police supplement service manual if you have the cop stuff
on the fxr the turn signal use a simple "flasher" like a car- they work with my ignition in run position AND run w/ headlight position...
do not do any soldering- it won;t hold up on a bike
Mike
start with a factory manual and that'll give you wiring diagrams for all the "stock" stuff- then figuring out the extra cop wiring isn;t so hard to figure out- you probably don;t have a siren or pursuit lights, do you?
There is a police supplement service manual if you have the cop stuff
on the fxr the turn signal use a simple "flasher" like a car- they work with my ignition in run position AND run w/ headlight position...
do not do any soldering- it won;t hold up on a bike
Mike
Last edited by mkguitar; Feb 28, 2017 at 12:30 AM.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,066
Likes: 4,568
From: Haslet Texas
I will never understand why people keep saying this as I have yet to have a single solder point fail on my bike and there are a bunch of them.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,066
Likes: 4,568
From: Haslet Texas
Murphy won't be denied!!!!!!
Road Warrior
Joined: Oct 2011
Posts: 1,376
Likes: 36
From: Round Rock, TX
Because when you solder a stranded wire, you essentially turn it into a solid wire and make it susceptible to damage from vibration.
Trending Topics
Dirt don't hurt
Joined: Jan 2011
Posts: 21,066
Likes: 4,568
From: Haslet Texas
I guess its like anything else...if you do it right there isn't a problem but if you do it wrong you will have a problem.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom
Verdad Gallardo
6 Weirdest Harley-Davidsons Ever Sold to the Public
Verdad Gallardo
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
The wire strands will break right where the tinning ends...one by one.
As they break, resistance and heat build and you just start to get funky problems such as overloads- until it fails altogether and goes open.
not today, but maybe tomorrow, or next week, or next month or at your next turn.
look at every car, truck and bike in your driveway- every wire joint is a crimp.
having built your wiring harness, you can be ready to fix it as you go. but if you just do it simple the first time...
I learned from experience, on that same 88 FXRP referenced above. Now I know.
BTW I solder for a living. I work with wires and electronics every day
mike
As they break, resistance and heat build and you just start to get funky problems such as overloads- until it fails altogether and goes open.
not today, but maybe tomorrow, or next week, or next month or at your next turn.
look at every car, truck and bike in your driveway- every wire joint is a crimp.
having built your wiring harness, you can be ready to fix it as you go. but if you just do it simple the first time...
I learned from experience, on that same 88 FXRP referenced above. Now I know.
BTW I solder for a living. I work with wires and electronics every day
mike
Last edited by mkguitar; Mar 2, 2017 at 12:29 AM.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,066
Likes: 4,568
From: Haslet Texas
The wire strands will break right where the tinning ends...one by one.
As they break, resistance and heat build and you just start to get funky problems such as overloads- until it fails altogether and goes open.
not today, but maybe tomorrow, or next week, or next month or at your next turn.
look at every car, truck and bike in your driveway- every wire joint is a crimp.
having built your wiring harness, you can be ready to fix it as you go. but if you just do it simple the first time...
I learned from experience, on that same 88 FXRP referenced above. Now I know.
BTW I solder for a living. I work with wires and electronics every day
mike
As they break, resistance and heat build and you just start to get funky problems such as overloads- until it fails altogether and goes open.
not today, but maybe tomorrow, or next week, or next month or at your next turn.
look at every car, truck and bike in your driveway- every wire joint is a crimp.
having built your wiring harness, you can be ready to fix it as you go. but if you just do it simple the first time...
I learned from experience, on that same 88 FXRP referenced above. Now I know.
BTW I solder for a living. I work with wires and electronics every day
mike