Hey, I'm trying to work out what's going on with my car's inlet heater.

I think the relay is missing. Is it the socket by the fuse box (passenger side)?

If so, what's the part no/other identifying thingy for the relay, so I can get a new one? I tried getting one off of Heritage but it is the wrong pin out.

Looking at the wiring diagram it's a standard 4 pin relay,  VW part no 141 951 253 B 

Also check the switch in the coolant flow

eg

https://www.mister-auto.co.uk/temperature-switch-intake-manifold-preheating/volkswagen-polo-86c-80-1-3-cat-55hp_v1604_g2136.html

 

(there's an m10x1 version of this on earlier cars before 1989)

Edited 8 January, 20197 yr by dvderlm
jan 1989 for new switch

Just a guess, but it is relay J81 in the Haynes book of lies wiring diagrams. It might have 81 written on it in large digits!

Edited 9 January, 20197 yr by dvderlm

12 hours ago, anessen said:

Hey, I'm trying to work out what's going on with my car's inlet heater.

I think the relay is missing. Is it the socket by the fuse box (passenger side)?

If so, what's the part no/other identifying thingy for the relay, so I can get a new one? I tried getting one off of Heritage but it is the wrong pin out.

 

Its the same relay that operates a bunch of cabin electrics I think - attached to a plate behind the passenger glovebox in the cabin (next to the indicator relay).

What are the symptoms of your heater problems? No fan speed at all?

 

#15 in this picture 

 

@zob Nothing to do with the cabin heating/fan it's the pre-heater in the inlet manifold

9 minutes ago, nige8021 said:

 

@zob Nothing to do with the cabin heating/fan it's the pre-heater in the inlet manifold

 

Ahh sorry - misunderstood! 👍

Great picture. (Though there are two #15 in that picture.)

 

What are 8, 9, 11, 14, 13, 16 relays for?

 

(Are any of them the X-contact relief relay, for example)

 

 

https://volkswagen.7zap.com/en/rdw/polo+derby+vento-ind/po/1982-9/9/937-99000/#15   #13 is the "X" contact

#6 (next to the fuses) is headlight washer relay.  VAG part 701955200

Edited 9 January, 20197 yr by dvderlm