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bushwhacker

R380 reversing light switch.

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Hello to all. I put a new switch in for the rev light but it would appear the plunger is not being pushed in when I select reverse. I have screwed it in all the way to the black o ring. The switch works ok out of the gbox. Has anyone come across this before. The plunger protruds 6mm at the end of switch, does anyone happen to have one lying about they wouldn't mind measuring for me. Regards Mark.

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What part number did you buy?  You never know...

O-ring?  It should have a flat washer and you are meant to tighten it right up.

 

The manual.

Quote

9. Refit reverse light switch with new copper washer. Tighten to 24 Nm.

 

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Hi part no was AMR3918 definitely came with an o ring, Haynes refere to a sealing ring I suppose it could be metal or rubber there was no switch in the gbox at all just a plastic bung . I will try and measure depth I can put a rod in the switch orifice out of rev and in rev. Thanks.

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Step 1:  Burn Haynes manual.

Step 2:  Get real manual.  You need the washer, part number 232042.

Are you sure you have the correct hole?

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I had the same problem.  A friend who welds like artwork tacked a blob onto the end of the plunger to extend it.  It's a common issue, though I'm not sure if the switch was pattern or genuine.

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Thanks Western, I managed to find that pt no also on the retroanaconda parts list. Had thought about a blob of weld, but knowing my luck it would break off and jam up the gearbox. 😭 Thanks.

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7 hours ago, western said:

R380 reverse switch is CDU51

https://rimmerbros.com/Item--i-CDU51

 

The only difference is the connectors.  The older one CDU51 has bullets.  The newer one AMR3918 has an econoseal connector.  The switches are the same.

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that'll be the difference between the retrofit R380's & the factory fit for 300tdi vehicles then.

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No.  There was a change during production.


CDU51 - SWITCH-REVERSE LIGHT MANUAL TRANSMISSION TRANSMISSION R 380 ALSO SERVICED AS PART OF A KIT [ - (V)MA949874 ]
AMR3918 - SWITCH-REVERSE LIGHT MANUAL TRANSMISSION TRANSMISSION R 380 ALSO SERVICED AS PART OF A KIT [ (V)MA949875 - ]

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2 hours ago, Red90 said:

The only difference is the connectors.  The older one CDU51 has bullets.  The newer one AMR3918 has an econoseal connector.  The switches are the same.

So why LUCAR connectors on the reversing light switch I have

 

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Posted (edited)
10 minutes ago, mmgemini said:

So why LUCAR connectors on the reversing light switch I have

No clue.  Is your truck a factory 300TDI with an R380?  Maybe someone changed the connectors.  If it was a retrofit from an LT77, that is what you would have.

Edited by Red90

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Mine is MA95 that was the reason I went for the AMR3918 ordered the other pt no so I"ll be able to compare. Not gen LR mind you.

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Test your switch carefully on the bench.  If it does not close contacts with a slight press, it is bad.  The aftermarket ones are usually bad.

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mine is a retrofit R380 for older vehicles it has the spade connectors.

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Which makes sense as that is what was used with older gearboxes.  There is probably another part number for that if you could ever find a part manual for a short bellhousing R380.  The switch itself should not change.

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2 hours ago, Red90 said:

No clue.  Is your truck a factory 300TDI with an R380?  Maybe someone changed the connectors.  If it was a retrofit from an LT77, that is what you would have.

Not a factory car. Built by Land Rover Special Vehicles for BT. Some UK insurance do not accept a LR special is a factory job

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1 hour ago, Red90 said:

Which makes sense as that is what was used with older gearboxes.  There is probably another part number for that if you could ever find a part manual for a short bellhousing R380.  The switch itself should not change.

The short clutch housing is in the defender parts book for non tdi 4 cylinder vehicles anyway, 

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Posted (edited)
3 hours ago, western said:

The short clutch housing is in the defender parts book for non tdi 4 cylinder vehicles anyway, 

Oh yes, it is there.  But they don't show a different switch number.  Typical Land Rover.

Edited by Red90

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Mine is MA95 that was the reason I went for the AMR3918 ordered the other pt no so I"ll be able to compare. Not gen LR mind you.

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Well switch CDU 51 is definetly longer than AMR 3918. Copper washer an I should be sorted. 😎20190415_131445.thumb.jpg.0f2376755cfffc44b0df8769ab2ee72d.jpg

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