FXE Starter, Solenoid and Relay Wiring
#1
FXE Starter, Solenoid and Relay Wiring
I'm installing a new high-torque starter and a new solenoid on my '75 FXE. I could use some competent advice on the wiring to make sure that I don't fry anything.
Starting at the starter solenoid:
There is a 4 gauge cable from the long solenoid post to positive battery terminal
There is a 4 gauge cable on short solenoid stud running to the starter motor.
There is one approx. 16 gauge wire running from the small post on the starter solenoid to the starter relay. Schematic shows it to be green, however it is black, so likely not the original wire.
Moving to the relay switch:
There is a black approx 16 gauge wire that was attached to the original relay that disappears into the wiring harness. I believe that to be the ignition wire and will attach it to the ‘S’ terminal on the relay.
The approx 16 gauge wire from the small terminal post on the starter solenoid will be attached to the ‘M’ terminal on the relay.
Here's where it gets a bit confusing, as based on the schematic I seem to be missing a wire. The schematic shows two connections on the long/positive battery solenoid post. The connection from the long solenoid post to the positive battery terminal is there. But it also appears that there should be a second, red wire running from the long solenoid post to relay post ‘B’, with the connection continuing from the relay post ‘B’ to the positive battery post. Do I need the additional wire from the ‘B’ terminal on the relay to the long post on the relay, which already has a 4 gauge cable running directly to the battery? I’m no electronics major, but it would seem as if the second ‘hot’ wire from the relay to the solenoid would be unnecessary, since there is already a direct ‘hot’ wire from the positive battery post to the long post on the relay. So possibly the schematic is accounting for multiple model years?
The schematic shows that I need to run a wire from the ‘B’ terminal on the relay to the positive terminal post on the battery. Am I correct in thinking that the wire from the positive terminal on the battery to the ‘B’ terminal on the relay switch need only be approx.16 gauge?
I think I’m only one wire away from having a new All B*lls hi torque starter and a new solenoid installed and ready. But until I can confirm that the wiring is correct I’m holding off making any more connections and pressing the starter button.
Thanks in advance for help with completing the wiring.
Starting at the starter solenoid:
There is a 4 gauge cable from the long solenoid post to positive battery terminal
There is a 4 gauge cable on short solenoid stud running to the starter motor.
There is one approx. 16 gauge wire running from the small post on the starter solenoid to the starter relay. Schematic shows it to be green, however it is black, so likely not the original wire.
Moving to the relay switch:
There is a black approx 16 gauge wire that was attached to the original relay that disappears into the wiring harness. I believe that to be the ignition wire and will attach it to the ‘S’ terminal on the relay.
The approx 16 gauge wire from the small terminal post on the starter solenoid will be attached to the ‘M’ terminal on the relay.
Here's where it gets a bit confusing, as based on the schematic I seem to be missing a wire. The schematic shows two connections on the long/positive battery solenoid post. The connection from the long solenoid post to the positive battery terminal is there. But it also appears that there should be a second, red wire running from the long solenoid post to relay post ‘B’, with the connection continuing from the relay post ‘B’ to the positive battery post. Do I need the additional wire from the ‘B’ terminal on the relay to the long post on the relay, which already has a 4 gauge cable running directly to the battery? I’m no electronics major, but it would seem as if the second ‘hot’ wire from the relay to the solenoid would be unnecessary, since there is already a direct ‘hot’ wire from the positive battery post to the long post on the relay. So possibly the schematic is accounting for multiple model years?
The schematic shows that I need to run a wire from the ‘B’ terminal on the relay to the positive terminal post on the battery. Am I correct in thinking that the wire from the positive terminal on the battery to the ‘B’ terminal on the relay switch need only be approx.16 gauge?
I think I’m only one wire away from having a new All B*lls hi torque starter and a new solenoid installed and ready. But until I can confirm that the wiring is correct I’m holding off making any more connections and pressing the starter button.
Thanks in advance for help with completing the wiring.
#2
when I do this I re direct the relay and starter wiring - the original set up is prone to run on - meaning the starter wont stop cranking the engine and in some cases has caused a wire fire - this is the set up I use
you are also guessing the black from the harness is the key on wire - to me that is the driver for the relay S term but I am not looking at what you are
you are also guessing the black from the harness is the key on wire - to me that is the driver for the relay S term but I am not looking at what you are
The following 3 users liked this post by johnjzjz:
#3
I bought one of those Blue Streak Relays too. Thought it was d.o.a. and replaced it. Found I was wiring it incorrectly. I'm not near my bike so I'm just off the top of my head right now and hope this helps. The two copper 4awg terminals need to be wired correctly, what I mean by that is it's not just a set of high amperage contacts. There is some internal wiring and the +Batt connection needs to go to the correct terminal. On my 81 FL I installed a lever start, replacing the solenoid that moves the starter gear in and out. When wiring the lever it used the "low amperage" stock relay in addition to a new "high amperage" relay (Blue Streak). The terminal from the "low amperage" relay passes +12vdc to one of those two 16awg terminals. This is the tricky part. Again, you have to connect it to the correct one of those two (I believe it is marked "S" in the drawing you provided) and leave the unused one alone. The 16awg terminal you use is internally wired to ground through it's coil.
Just make sure you have the relay orientated just like the drawing and it should work.
Man..... I hope I helped and didn't add to the confusion....
Just make sure you have the relay orientated just like the drawing and it should work.
Man..... I hope I helped and didn't add to the confusion....
Last edited by mikeyhd_81shovel; 07-18-2017 at 05:15 PM.
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Gappy (04-17-2020)
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#9
if you compare the original wire diagram and what I posted in the pictures and if you under stand what I do with the wiring to stop any chance of a run on you should go ahead and re do yours
if you don't get it looking at it in the photo then don't, as I wont be able to help other then the actual in the photo
if you don't get it looking at it in the photo then don't, as I wont be able to help other then the actual in the photo
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hotrodjohn71 (09-22-2017)