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 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

 

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.

 

TexasHill I agree. I solder the harness on everybike I have every built and none have issues.

 

You do realize that by saying this both of us are going to have a solder joint fail soon don't you???

Murphy won't be denied!!!!!!

 

LOL I am safe I always keep a micro torch solder and shrink wrap. I rode Jap for to many years to be stranded by electrical. Hell if lukas couldnt get me no one can

 

Because when you solder a stranded wire, you essentially turn it into a solid wire and make it susceptible to damage from vibration.

 

I get what you are saying but the fact remains that I have soldered joints that have been in there for years with no issues.

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.

 

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

 

Seeing as how I've got about 8 years and approx 35-40k miles (I didn't keep a record book back then so I don't have accurate info) on my oldest solder joints I ain't gonna start worrying about it now.