Hi All - a little help needed please.

No reverse lights on either side when put into reverse gear.

I have checked for power at the bulb with ignition accessories on and nothing. The other lights worked ok. I then looked for the switch on the gearbox and what looked like the switch and a 2 pin plug were all alone and not plugged into anything. Photos below

Sapphire 4x4: 2 pin switch from Reverse switch on gearbox??

Sapphire 4x4: Reverse switch on gearbox ??
I am presuming this is the reverse switch? It certainly looks like it as it is a 2 wire (hoping)!!!
Ok - if it is the correct one, can someone please indicate how I now wire this to the rear reverse lights please? Thanks

 

Number 3 is the reverse light switch.

 

Thanks for the replies. I have located the supposed reverse connector in the engine bay and it is disconnected with no lead to the gearbox! I will attempt to do a simple connection later to see if it works (fingers crossed!!). I have not checked the fuse yet but will do. It just makes me ask the question why was it removed in the first place? Photos provided but I think it is the correct connector:


I may just have to do a temp connection to get it working then sort out properly later.

 

Might be some helpful information in this thread.

https://passionford.com/forum/ford-s...-conector.html

David

 

Thanks buddy - that is the exact thread I looked at too! I jumped the under bonnet connector and the reverse lights came on!! Yippeee! So looks like it is the switch. Now to find one in Perth!! I'm thinking it is the MT75 gearbox??

 

Yes it is. I also have a 1990 4x4 saph here in NZ.
David

 

Great - anybody got one they don't want and can post asap? Obviously, I will cover postage etc. I have got a quote for a used one here in Aus. But at $100 + postage seems a bit rich to me. - definite "Cosworth Tax."

 

Is this it?

https://www.bearingkits.co.uk/Ford-S...switch/820.htm

 

Next developments.
1. I checked the physical movement inside the hole where the reverse switch goes - there is a pin that obviously moves upwards, connects with the extended arm of the switch and makes the circuit so the reverse lights come on. The power for the circuit comes from the under bonnet connector (that definitely works).
2. The new (used) switch arrived and I decided to rig up a "test" under the bonnet before fitting it in the awkward place that it is. I wired it up as it would be wired when connected properly - +ve to blue/ black wire/ -ve to black wire (Photo 1) and turned the ignition on. I double checked the bridge connection worked again and all good. I then connected the metal arm (photo 2) to an earth hoping the switch would work and NOTHING. I repeated the same with my original switch and NOTHING.
Photo 1


Photo 2



I then got thinking once more and realised that I don't really understand how this switch actually works. Most reverse switches have a a ball bearing that is pressed in making the connection - this just has an extended metal arm that does not actually move. With a +ve in and -ve out how does the connection made by the small arm in the MT75 gearbox make the switch actually work??
Can somebody more knowledgeable please enlighten me as I may be testing it incorrectly OR the fault may actually lie with the inside of the gearbox and not the actual switch!!
Thanks

 

Hey All - I sussed how the switch works. It is literally a small movement of the arm upwards. The selection of reverse forces the pin onto the bottom of the arm, moves it upwards and this creates the circuit. I knew it had to be something simple!