Whats me relay relaying ?

Post by **OB1** » 21 Aug 2006, 23:41

I 've got a 1.9 water cooled petrol dg engine ,A reg there is a relay in the black box full of wires on the n/s in the engine bay -do any of you electriky boys know what it controls
OB1

Post by **irish.david** » 22 Aug 2006, 00:19

If you mean the black box of wires thats screwed to the front left of the engine bay (looking back to front) then I believe the relay in question is connected to the inlet air manifold heater. It's located under the resonating chamber on the inlet manifold and is switched on the temperature of the coolant.

Dave

Post by **OB1** » 22 Aug 2006, 10:42

irish.david wrote:If you mean the black box of wires thats screwed to the front left of the engine bay (looking back to front) then I believe the relay in question is connected to the inlet air manifold heater. It's located under the resonating chamber on the inlet manifold and is switched on the temperature of the coolant.

Dave

Many thanks -that shouldnt stop the bus idling then -must be something else
many thanks
OB1

Post by **HarryMann** » 22 Aug 2006, 11:02

Might make it idle a bit rougher though

Post by **irish.david** » 22 Aug 2006, 20:18

If the heater's partially shorted then the extra drag on the alternator might lower the idle speed of the bus. Pretty simple to check. Just pull the relay and if the bus idles better then you've found the culprit.....

Dave

Post by **OB1** » 23 Aug 2006, 20:51

irish.david wrote:If the heater's partially shorted then the extra drag on the alternator might lower the idle speed of the bus. Pretty simple to check. Just pull the relay and if the bus idles better then you've found the culprit.....

Dave

I'll give it a try
OB1

Post by **HarryMann** » 23 Aug 2006, 21:18

Just pull the relay and if the bus idles better then you've found the culprit.....

Can't get simpler than that