SOHC.co.uk Forums > CB350/400

Problem with horn wiring.

(1/6) > >>

ted_paper:
I have just disconnected my old horn with the intention of replacing it with a louder (hopefully) one.
When I fitted the new one - nothing. So I swopped it back for the old one  - again nothing.
I didn't check before removing the old one that everything was working so that was probably my first mistake...
As I have said on a previous post, electrics are a bit of a mystery to me. I have a multimeter which I am not entirely familiar but have established that my battery is fully charged, and if I stuff the 2 probes into the connectors to the horn, switch on the ignition and press the horn button then there is no reading showing.
Any advice where to start looking would be gratefully received.
Thanks 

Johnwebley:
Does any of the switches in the left hand switch gear work?

Do you get lights and indicators?

Try and make a circuit tester,

Use a bulb holder, like fitted as the idiot lights, and get a couple of crocodile clips, that will make life much easier

Have you got a wiring diagram??


Good luck

Sent from my SM-A546E using Tapatalk

ted_paper:
Yep, lights and indicators are working.
I have a Haynes manual showing the wiring, but I'm not sure how or what I should be testing...  :)

Johnwebley:
If you can find a simple tester as I said, earth one lead to the motor or bolt head on the frame,

The other wire connect to a horn lead,press the button, hopefully the bulb will light,

Do this test on both leads,

Can you make out the colour of the leads?

Do they match the manual?

Have you tested the horn??



Sent from my SM-A546E using Tapatalk

McCabe-Thiele (Ted):
As John has said I would start by simply putting a test bulb where the horn was connected - if it does not light up with the ignition on & horn button depressed start checking for voltage in the circuit.

Some Hondas have the earth wire at the horn end with a live feed to the horn from the ignition circuit via the button. Other models have the button as the earth connection.

Navigation

[0] Message Index

[#] Next page