Neutral light always on and flasher blows fuses. 75

[mm1ut1]

My 75 neutral light is always on. Also the flasher relay buzzed like crazy and the left blinkers didn’t work. I bought a three prong relay at an auto parts store and now it blows the main fuse when I try either side of the turn signals. Should I get the neutral light fixed first or the turn signals? Any chance they could be related?

 

[Jim]

My 75 neutral light is always on..... Any chance they could be related?

I'm assuming you mean even when in gear, the light is on?
Most likely not related.
The neutral light comes on from the neutral switch going to ground (providing a ground). So if your light is always on, there's a short somewhere downstream of the light. I'd start by disconnecting the switch and see if the light goes out. If it does, the switch is most likely shorted internally.
If the light stays on with the switch disconnected, you'll have to chase the wire back to the light and find where it's shorted or wired incorrectly.

I bought a three prong relay at an auto parts store and now it blows the main fuse when I try either side of the turn signals.

Have you looked in Tech or did a forum search? Something sticks in the back of my mind that you need to switch two of the wires at the relay connector..... 'though I'm not sure if I'm remembering that correctly.

 

[Its been a long time]

I'm assuming you mean even when in gear, the light is on?
Most likely not related.
The neutral light comes on from the neutral switch going to ground (providing a ground). So if your light is always on, there's a short somewhere downstream of the light. I'd start by disconnecting the switch and see if the light goes out. If it does, the switch is most likely shorted internally.
If the light stays on with the switch disconnected, you'll have to chase the wire back to the light and find where it's shorted or wired incorrectly.


Have you looked in Tech or did a forum search? Something sticks in the back of my mind that you need to switch two of the wires at the relay connector..... 'though I'm not sure if I'm remembering that correctly.

I had to do that when I fitted a standard three terminal automotive flasher relay in my 650D. There's a post on here somewhere detailing the wires I switched in the terminal block.

Edited to say - here's a link to what I did.

https://www.xs650.com/threads/turn-signal-issue.66381/post-839620

 

[gggGary]

I'd be looking at the solder blobs on the LH handlebar control. A loose wire may be grounding.

 

[Bob Wegman]

To save your fuse budget. Remove the fuse that blows and replace it with a light bulb. The bulb will light when a short is present. When you locate the short the light will go out. Repair the short and then swap the light bulb for the original fuse.

 

[gggGary]

75, still has the wires inside the handlebars?
cut/grounded wires where they go through the openings a suspect.

 

[jaybar6]

Here is the circuit for a 77 or 78

 

[gggGary]

IIRC the 75 headlight bucket is a mass of bullet connectors with few multi wire blocks, a mis-matched pair of wires or three is very possible and easy to fix.

 

[mm1ut1]

I checked the light switch today. Everything looked good. Checked the left turn signal bulbs. Left rear had corrosion so I cleaned it up. I finally ordered a new neutral switch cover as the old one was rock hard. Dangitall! Spring is around the corner and lots to do!

 

[Pat D]

IIRC the 75 headlight bucket is a mass of bullet connectors with few multi wire blocks, a mis-matched pair of wires or three is very possible and easy to fix.

You do, assuming my '74 is a reasonable comparison.

 

[Jim]

Well that's a head scratcher...

 

[Pat D]

Well that's a head scratcher...

View attachment 344761

Yeah, it was a challenge. I ended up getting an unmolested main harness off Ebay, but figuring out what others had done inside the bucket was a nightmare. I've got a lot of pics like this in the inventory from getting it sorted out. Matching what I had against whichever diagram they seemed to jive with.

 

[650Skull]

Link to assembly manuals.
https://thexscafedotcom.wordpress.com/tag/manual/page/10/
Need to scroll down till you find the 74 and 76 ones.
Headlight bucket from the 74 and 76

 

[Raymond]

Have not seen that style of wiring diagram - looks almost like something even I could read.

 

[650Skull]

Is the black wire, ( yellow arrow), the main power wire coming from the indicator going into the join with a dark green wire.

 

[650Skull]

I have a pic on my laptop showing the wiring for the gauge cluster. Will post it tomorrow if it helps. To late tonight.