reverse lights come on in any gear s50

[yetti24]

just finished my s50 b30 conversion with evo 6 speed box , anyone had this problem , any gear i put the car in the reverse lights come on , i changed the reverse switch for a two pin one out of a dogleg gearbox i had , is this the problem or could it be wiring ? , what switch has everybody used on there s50 conversion ? , thanks

[jmc330i]

Which wiring loom have you connected the switch to?

On the E30, the reverse lights are on the body loom. You need to connect the original E30 reverse light wiring to the E36 switch in the gearbox.

On the E36, the reverse lights are on the engine loom, so when fitted into an E30, you will have a spare wire/plug (that runs down with the 02 sensors wires), that would of been for the reverse lights on the E36. This wire can be removed or just taped up and tucked away somewhere.

[yetti24]

hi i connected it to the e30 body loom , and replaced the e36 switch with one i had in an old e28 dogleg gearbox , as the e36 one has three pins and the e28 switch only has two pins , it just seems a bit strange that the reverse lights are not on when the gearbox is in neutral and come on in any gear including sixth gear

[ian332isport]

I think you'll find you've connected into the gear recognition switch, not the reverse light switch. See below:



Ian.

[yetti24]

thanks for picture ian i will have a look tomorrow i think the top switch in the picture was the one that i changed for a two pin switch as i did it before i put the gearbox in , if i remember rightly the plug for the gear recognition switch comes off the s50 loom and is a standard bmw plug and the e30 reversing switch loom is just like two spade connectors which go in through the rubber gear gator

[ian332isport]

if i remember rightly the plug for the gear recognition switch comes off the s50 loom and is a standard bmw plug and the e30 reversing switch loom is just like two spade connectors which go in through the rubber gear gator

The gear recognition connections are just a pair of spade connectors with a black rubber cover that fits over the end of the switch. The reverse light connector is a fairly standard 2 pin connector (like a water temp sender).

Ideally, you'll fit a suitable connector on the E30 wiring, and plug it in. Failing that, you may be able to find a suitable switch with a pair of spade connectors.

Ian.

[yetti24]

i should read things properly , thats exactly what i have done connect it the wrong way round , off to the scrappy then to get a 2 pin plug thanks again ian

[buster]

I did exactly the same thing when i did my conversion.

[yetti24]

guess what chopped both plugs off swapped them around and hey presto , thanks ian

[yetti24]

i saw your conversion buster nice job , nicked your idea with the 4 cylinder covering for the wiring on the bulk head , bought a carbon fibre plenum like you did and managed to get it fitted with a lot struggling , did you get yours fitted in the end ? , i am going to start the write up on mine tonight

[buster]

i saw your conversion buster nice job , nicked your idea with the 4 cylinder covering for the wiring on the bulk head , bought a carbon fibre plenum like you did and managed to get it fitted with a lot struggling , did you get yours fitted in the end ? , i am going to start the write up on mine tonight

no i never got around to fitting it as i wasn't happy with the quality of the inlet trumpets.I can't wait to see your build thread.Its good to see how other people get around problems.

[jmc330i]

Its good to see how other people get around problems.

And then quietly think to yourself 'doh, why didnt I think of that?!'

[yetti24]

yeah i am not 100 percent happy with the trumpets gonna have to make some more or get them made