190E alarm problem

[markjf]

Hi,

I have a 190E with what I believe to be a factory fitted Scorpion 758 alarm. The alternater packed up and battery went completely flat with the alarm doing lots of wierd things!

What I need is a wiring diagram for the alarm so I can disconect it as the car will now not start... even with a new battery and alternator!

Any help at all will be grateful

Regards

Mark

 

[markjf]

If anyone has any idea why my car has decided not to start since I changed the battery I'd be really grateful... Do I need to reset the alarm? If so do you know how I would do this?

I'm desperate for the car tomorrow to take my daughter home so am really hoping someone can help.

Thanks

Mark

 

[markjf]

When cranking the engine I have realised that I only have a dribble of fuel coming out of the fuel pipe which feeds the injectors. The fuel pump makes a noise when I turn on the ignition, but could it mean that the fuel pump is not pumping enough pressure and that it has packed up due to the battery going flat?

Any help/advise???

 

[television]

I think that you will find the overvoltage relay/fuse is faulty. Easy way to check with a volt meter on pin 87 (you could have 2 pin 87's) and check for 12 volt on both if you have 2, if you only have 7.5 the fault is within the relay.
What happens when this goes is that you lose the 12 volt supply to the control boxes and the car either cant start or will run rough from cold.

Malcolm

This is consistent with changing the battery

 

[markjf]

Thanks Television,

I'll give it a try later on, it sounds hopeful as I later last night I saw there is quite alot within the forum on this fuse/relay.

Figers crossed!

 

[John T]

John T Scorpion Details

Hi Markjf

Here is the address etc of Scorpion

SCORPION AUTOMOTIVE
Drumhead road,
Chorley North Business Park,
Chorley, England, PR6 7BZ
PHONE 44 (0)1257 249928
FAX 44 (0)1257 249938

E-mail info@scorpionauto.com

They are trading again or were in October 2005 ask for Tony


Regards John T

 

[markjf]

Thanks for the Scorpion details, I have spoken to Tony and he has been able to help however, the car will still not start!

I have yet to try the OVP relay and fuse - I have not had time to do this as yet - Work sems to get in the way!

Thanks

Mark

 

[markjf]

I think that you will find the overvoltage relay/fuse is faulty. Easy way to check with a volt meter on pin 87 (you could have 2 pin 87's) and check for 12 volt on both if you have 2, if you only have 7.5 the fault is within the relay.
What happens when this goes is that you lose the 12 volt supply to the control boxes and the car either cant start or will run rough from cold.

Malcolm

This is consistent with changing the battery

Hi again,

I have checked the fuse which I believe to be the overvoltage one - does this have a hinged cover on it? If so, there are two (10amp) which are both ok.

I would now like to check 'pin(s) 87' but I have no idea where to find it/them! Could you give me a brief description so I can check the voltage please?

Thanks for your help

Mark

 

[John T]

John T

Hi Markjf try looking on the base of the relay that it plugs into there maybe
some pin numbers there or on the bottom of the relay.

Regards John T

 

[markjf]

So... would I leave the relay connected but leave a gap between the relay and the connector to get the volt meter proble to the pin?

Sorry for all the questions!!!

Thanks

Mark

 

[John T]

John T

Hi Markjf once you can see the pin number you want if you can't get under the base just ease the relay out slightly so you can get youre test meter
onto the pin or put a piece of fine flexible cable around the pin but insulate it with tape and plug the relay in you can then join your test meter to this cable.

Regards John T

 

[John T]

John T

Hi markjf Just ease out the relay once you know which pin number to get your test meter on or you could remove the relay and wrap some flexible
cable to it and insulate it with some tape then connect your meter to the cable with the relay plugged in. It would be better if you could get your test meter leads direct onto the base or relay pin.

Regards John T

 

[John T]

John T

Hi markjf Just leave a gap pull the relay out slightly to get at the teminal
that is if you cannot get at the base terminal or you could wrap some cable around the terminal on the relay and put some tape around it then plug in the relay you can then connect your meter to the floating cable.

Regards John T

 

[markjf]

Hi,

I have now checked the OVP relay which is showing 12 volts from both of the 87 pins. Are there any other ideas out there... they would be most appreciated!

Thanks

Mark

 

[markjf]

I've now sorted the problem!

As the car had been standing for a week before I fitted the alternator, there must have been some dampness in the distributor cap and on the plug leads which would not let the car start. I jump started it from the wife's car and left it turning over and over and over when suddenly, it cough and spluttered into life on three cylinders.

I realised a lead was not playing ball so bought a new set with a distributor cap and rotor arm!!!

I can't believe that after all the time I have spent on the bl***y thing it was that and nothing to do with the alarm at all.

I have put the car back together now and reconnected the alarm and it's never run so smooth - strange as these things were only replaced last year.

Anyway, thanks Malcolm and John for your help

Regards,

Mark