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Relay help, please #692425
08/03/21 05:28 PM
08/03/21 05:28 PM
Joined: Sep 2014
Posts: 119
North Yorkshire
V
vbalddave Offline OP
L - Learner Plates On
vbalddave  Offline OP
L - Learner Plates On
V

Joined: Sep 2014
Posts: 119
North Yorkshire
I want to carry spare relays for the fuel injection and fuel pump for my '93 +8 (so, Lucas 14 CUX), and in an attempt to avoid mounting an expedition into the murky depths of the passenger footwell, does anyone know from memory the correct relays, please? Are they Bosch 0332014112 (which seems to have been replaced by Bosch 986AHO602), or AFU2913L, or something else entirely?

When I acquired the vehicle I was given a pair of Durite relays, which I was told were correct for it. However, the illustration on the top of these relays shows that the diode protects terminal 85, whereas in the Bosch relays (assuming that these are, in fact, correct) the diode appears to protect terminal 86.

My grasp of relays is minimal (as you will have discerned from the above!), so please feel free to correct any (or all) of this.

Thanks in advance for your help.

Dave


vbalddave

Red 1993 +8 3.9

North Yorkshire
Re: Relay help, please [Re: vbalddave] #692460
08/03/21 07:30 PM
08/03/21 07:30 PM
Joined: Feb 2016
Posts: 3,681
East Harling, Norfolk UK
RichardV6 Offline
Talk Morgan Addict
RichardV6  Offline
Talk Morgan Addict

Joined: Feb 2016
Posts: 3,681
East Harling, Norfolk UK
Since terminals 85 and 86 are the two legs of the relay coil and the diode has to be fitted across same and reverse biased to normal operation in order to quench the back emf from the collapsing magnetic field of same, you need not worry in this respect since I'm not aware of any positive earth diode relays.

Terminal 86 will be the positive supply BTW.

Last edited by RichardV6; 08/03/21 07:40 PM.

Richard

2018 Roadster - Red/Magnolia - "Morton"
1966 Land Rover series 2a SWB
1960 Velocette Venom
Re: Relay help, please [Re: vbalddave] #692465
08/03/21 07:37 PM
08/03/21 07:37 PM
Joined: Aug 2017
Posts: 247
Mercia, UK
SALMO Offline
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SALMO  Offline
L - Learner Plates On

Joined: Aug 2017
Posts: 247
Mercia, UK
Hi Vbalddave,

The diode is across the coil, terminals 85 & 86.

Have a look at relays on, say 12voltplanet website and you will see.

Hope this helps


Regards

Geof

70th Anniversary 4/4 (Duratec 1.8), model 1995
Re: Relay help, please [Re: vbalddave] #692522
09/03/21 01:40 AM
09/03/21 01:40 AM
Joined: Sep 2010
Posts: 1,959
Wales
T
Taffmog Offline
Talk Morgan Enthusiast
Taffmog  Offline
Talk Morgan Enthusiast
T

Joined: Sep 2010
Posts: 1,959
Wales
Hi Dave, sorry can't help with the references at the mo, I think they are on GoMog (?) but I had a non starting car and replaced the fuel relays with brand new Bosch units in Lucas boxes, still no joy despite attempts by a mechanic and an auto sparkie. Had to do a Factory visit and they got it running within minutes with their Chinese made relays!
Apparently the Bosch units disintegrate on the shelf with age hence my problems.


1969 4/4
1995 plus 8
2002 Aero S1
2013 M3W
2014 Plus 8
Re: Relay help, please [Re: vbalddave] #692530
09/03/21 06:42 AM
09/03/21 06:42 AM
Joined: Sep 2014
Posts: 119
North Yorkshire
V
vbalddave Offline OP
L - Learner Plates On
vbalddave  Offline OP
L - Learner Plates On
V

Joined: Sep 2014
Posts: 119
North Yorkshire
Hi All,

Thank you very much indeed for taking the time to reply, and the wise words therein. On the basis of the information, I'll keep my Durite relays as spares, as they appear fit for purpose....and hopefully I won't need to use them.

Best regards,

Dave


vbalddave

Red 1993 +8 3.9

North Yorkshire

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