Punto443

Well-Known Member

• Oct 1, 2020

• #1

So.....
My 92 110 has a full puma bulkhead and dash fitted, and I noticed the wires and button etc were fitted for the heated windscreen.

Drivers side is wire is earthed, checked with a meter.
With engine running, press button, relays click and get a voltage reading on the passenger side wire.

But a second later it cuts off and the light on the button goes out. Anyone got any info on it?

Is it controlled by a body control module etc? Could it be shutting down as its missing a run signal?

Any help would be great

 

mick 1986

Well-Known Member

• Oct 1, 2020

• #2

Punto443 said:

So.....
My 92 110 has a full puma bulkhead and dash fitted, and I noticed the wires and button etc were fitted for the heated windscreen.

Drivers side is wire is earthed, checked with a meter.
With engine running, press button, relays click and get a voltage reading on the passenger side wire.

But a second later it cuts off and the light on the button goes out. Anyone got any info on it?

Is it controlled by a body control module etc? Could it be shutting down as its missing a run signal?

Any help would be great

Click to expand...

When you say “92 110” is that with a 200tdi engine, or a ringed/rung Puma, on a 92 plate?

 

Punto443

Well-Known Member

• Oct 1, 2020

• #3

It's a 92, originally a 200tdi. Now a 3.5slt

It has had a puma bulkhead and dash fitted. With a receipt from a breakers.

So now I have justified myself, can you be of any assistance? Or do you need further investigate my intergety?

 

mick 1986

Well-Known Member

• Oct 1, 2020

• #4

Punto443 said:

It's a 92, originally a 200tdi. Now a 3.5slt

It has had a puma bulkhead and dash fitted. With a receipt from a breakers.

So now I have justified myself, can you be of any assistance? Or do you need further investigate my intergety?

Click to expand...

Personally, I couldn’t give a **** if it was a ringer.

Do you have a BCM fitted, or just the bulkhead? What wiring did you fit? I’m not familiar with that engine, and it’s associated wiring, but I would expect the heated screen to be controlled by a simple timer relay. Can you see any numbers on the relay that is being controlled by the switch?

 

Punto443

Well-Known Member

• Oct 1, 2020

• #5

Tbh, I'm not sure if it has the bcm fitted, I think it's there as the full puma fuse board is, I didn't fit it, and I'm just finding my way around it.
Just wondered if there was any common faults to save me time and point in the right direction, but I think it'll be out with the meter and bits of plastic everywhere!

 

mick 1986

Well-Known Member

• Oct 1, 2020

• #6

Punto443 said:

Tbh, I'm not sure if it has the bcm fitted, I think it's there as the full puma fuse board is, I didn't fit it, and I'm just finding my way around it.
Just wondered if there was any common faults to save me time and point in the right direction, but I think it'll be out with the meter and bits of plastic everywhere!

Click to expand...

If I were you, I would rewire it using either a dedicated timer relay, or a standard high current relay. Mine is wired in with a calling switch, controlling a 70A relay, all on 4 or 6mm and 40A fuses (I think).

If you can see the relay that is switching, find a part number and see what it is and how it’s wired. The easies option may be to swap that for a timer relay that will work with the wiring you already have. It may not be possible, so you may have to modify some wiring.

 

Wimblowdriver

Well-Known Member

Full Member

• Oct 1, 2020

• #7

These diagrams might help. They are for the 2.2 puma engined landys, 2012 on. Might be different for 2.4 puma but don't have those diagrams.

 

Attachments

• Defender MY12 Electric Wiring Diagrams (dragged).pdf

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• Defender MY12 Electric Wiring Diagrams (dragged) 2.pdf

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Punto443

Well-Known Member

• Oct 2, 2020

• #8

Cheers guys,
Looking at those diagrams, I think it could be as simple as I'm missing the engine run signal,
If it's more complex, I may just rewire it, sure I've got a timer relay kicking about from my old mk6 transit, probs be a week or 2 until I get a look at it with work etc, I'll post up how I get on.

 

PaulMc

Active Member

• Oct 2, 2020

• #9

No need to completely rewire it, or use a different timer.

The Defender has used the same timer relay since the heated windscreen was introduced on the 2002 Model Year TD5.

On the TD5, terminal 6 of the timer relay is taken to the oil pressure switch, in order to determine that the engine is running.

.

 

Punto443

Well-Known Member

• Oct 11, 2020

• #10

So looks as if it is just missing the run signal, so I've just ordered up the heated screen.
The original was broken anyway and not like there is a massive difference cost wise.

Thanks for the help

 

Punto443

Well-Known Member

• Dec 24, 2020

• #11

Incidentally if anyone is interested, I found out after speaking to Martin from futuranet the the run signal on the puma is taken from the tacho.

 

Punto443

Well-Known Member

• Dec 29, 2020

• #12

It's alive. All it needed with the working tacho for the signal