Reverse lamp not coming on.

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Morpheus
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Hello all. My 463 G500 left hand drive has no reverse light when vehicle is put into reverse gear. So I checked the bulb and the reverse camera and they seemed to be ok. I looked at the fuse diagram and it says electronic. I checked the fuses on the drivers side dash. I will check the relay in the front passenger footwell. But if anyone can help advice greatly appreciated. Thank you.Morpheus.
Pistonhead
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Re: Reverse lamp not coming on.

Check the connection  and, or starting inhibitor switch; the reverse light switch is part of the inhibitor switch.

Mounted on the nearside of (Left side - looking from the rear of vehicle) gearbox. 

Morpheus
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Re: Reverse lamp not coming on.

Thank you  very much for the information. Do I access the switch from the engine compartment or from underneath ?

Pistonhead
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Re: Reverse lamp not coming on.

Access to the switch is from underneath the vehicle and at the left side of gearbox, more towards its rear.

Morpheus
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Re: Reverse lamp not coming on.

 

Thank you. 

Regards.

M.

Morpheus
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Re: Reverse lamp not coming on.

Hello,

1. Rear reverse sensors not working.

2. Reverse light not working.

3. Rear camera not working.

This is a G500 2004 with an automatic gear box. Is the reverse switch on the gearbox or the gear shift? Could this little list be the switch?

Directions to proceed.welcome

Response appreciated. Does anyone have a pic.

Many Thanks,

M.

jdring
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Re: Reverse lamp not coming on.

Hi Morpheus - you are not getting too many more suggestions :(  There are not so many GWOAers on regularly at the moment.

These ones are always tough because it will be something little and yet there is no way to find it except by methodical trial and error.

You already checked the bulb etc but since multiple rear-operations are not working it suggests it is at the actuator end. Find where that trigger/microswitch/relay is and either replace it or bypass it to test?  There will be a circuit diagram showing the components involved somewhere.  Probably on this site if you search a bit longer?  

(Maybe cancel/scratch your duplicate post to keep it all in here?)

Morpheus
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Re: Reverse lamp not coming on.
Thank you so much for the advice. I am not sure if the switch is on the gear shift or on the gear box housing underneath for the 4 matic model. I looked at the diagram and it looks like its a relay. I am in Germany at the moment and the MB agency is not very helpful almost aloof. Thanks again.
jdring
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Re: Reverse lamp not coming on.

Try this GWOA link... its for a G350, a 463.  Maybe some good links in here.

http://gwoa.co.uk/content/463-main-350 

Wiring diagrams are in the Electrical section (duh).

Last page, 116, says the switch is on the gear shift lever bracket with a cable connector to the gearbox (X22/2).

No idea what a 4Matic is... I thought all 463s are permanent 4x4 !!

 

 

 

 

 

Pistonhead
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Re: Reverse lamp not coming on.

Hello Morpheus

Would PM me your Full chassis number.

Morpheus
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Re: Reverse lamp not coming on.

 

Pistonhead and jdring,

Really got to thank you for this bit of info.

So there is a switch on the gear shift. 

Please correct me, but I thought if it was not a manual shift it was automatic (4matic)

Any pics of the shift switch or the external switch on the gearbox housing or if there is a relay in the fuse tray would be appreciated.

WDCYR49E94X144023.

JD the link says page not found.

MB Germany act like they are off planet.

Many thanks for your help.

Regards,

M.

LEONIDAS
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Re: Reverse lamp not coming on.

As pistonhead mentioned, the reversing light is actuated by the inhibitor switch which is on the left side of the gearbox, it is a plastic lever with circular central part. When you engage the gear this lever also moves forward or backwards. to check if it works try starting the  car with the gear lever in any other than park position. If it starts, the inhibitor switch is at fault. if the engine does not start, then the switch is OK. Then try with a multimeter to see if you get any voltage to the reversing light. If you don't , then check the connections to thei inhibitor switch. 

Morpheus
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Re: Reverse lamp not coming on.

Many thanks for your responses.

Regards,

Morpheus

Morpheus
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Re: Reverse lamp not coming on.

Hello All,

The reverse light saga continues. I checked the supply to the tow ball electrics and there is no supply when the shift is put into reverse.

When the shift is in reverse the monitor showing the reverse grid and proximity sound work perfectly.

I have climbed under the "G" and it appears there is no switch or mechanism on the side of the gear box, and the linkage from the shift stick to the gearbox does not show any signs of wear.

So, the monitor confirms when reverse is engaged and the engine will only start in park or neutral, I do not think it is the switch. A break in the wiring seems most probable but are there any other check points eg. fuses or relays ?

1. No reverse lights.

2. No reverse camera ( been spliced into reverse light wire)

Many thanks, all responses appreciated.