shamrock

I've been trying to familiarise myself with the oil cooling system , using the very excellent P.Car site.
There are details here ... http://p-car.com/diy/fan/#Troubleshooting ..
on how to check if the low/high speed fan is functioning by doing a relay jumper test. Please excuse my ignorance , but the website doesn't explain in detail how to do this , and I don't want to do any damage to the car trying to figure it out myself ...
So when it describes 'jumping terminals' , what exactly does this mean?

Apologies again if this is a terribly simplistic question.

Thanks

coltj

You just have to put a short conductor(small gage, insulated wire stripped at both ends) into the indicated pin sockets. It's quite simple and easy to do. I think this was one of my first DIYs. Good luck.

JasonF

It's not a simplistic question at all, I too had no idea how to do this until I got under the hood and investigated how to do this.

"Jumping the terminals" is pretty easy once you know the steps. First, remove the R04 relay as stated in the p-car directions. Second, get a piece of decent wire and strip a cm or so of the insulation to expose the wire itself. Speaker wire may not work for this application, and I used a length of wire provided in an automotive electrical repair kit (8 or 10 gauge I believe). Third, the relay itself provides a schematic of the terminals that the relay "prongs" go in to. The terminal numbers are stamped in very small print on the underside of the relay. Find the correct terminals in the fuse box that the R04 relay was plugged into. Fourth, insert the wire into the 3(30) slot and the 7(87c) slot. Since the terminal is energized, you may see a spark. If your fan runs, your ballast resistors are fine. Fifth, do the same procedure for the 3(30) and 5(87c) terminals for high speed operation. From there you can use the p-car site for troubleshooting.

Good luck!

shamrock

Thanks very much!

The temperature here in Dublin hasn't gotten above 4-5C in the last four months so I haven't seen the oil temp rise above the 194 mark . I know that Summer temps will bring the oil temp well up , and I'd like to be sure the fan system works before it has to work!

JPS

Ok, so I'm a bonehead and missed it...which one is R4?

Fred's 964

Shamrock, if you are just testing the fan, you don't have to use a jumper. Just take the cover off of the fan relay and depress one of the relays inside to energize the fan. Jason's post explains how to identify the correct relay. One relay is slow speed, one is fast speed. This will also test your fan slow speed resistor. If one relay starts the fan running and the other doesn't, your resistor is probably bad. This would mean that your fan will only work when the oil temp is at a higher level. The slow speed should come on at a lower temperature.

shamrock

Thanks Fred , this thread is a few months old ... since then I've changed the resistor , fan works fine now.
Still have to tackle the a/c resistor

JPS

So I'm still a bonehead...which one is R4?

JPS

Just getting back to this project...is R04 (oil blower relay) in the boot or in the engine compartment?

coltj

It's in the "boot".

Garth S

As you face the CE/Relay panel from the front of the car, R04 is the on far right hand side of the front(most) row: to the immediate left is R14, an identical 'double' relay in a tall black case with a #1 on top.

PS: all relays and fuses are identified by adjacent inscribed numbers in the CE panel plastic

JPS

Yeah, I could see that it was R04, but couldn't for the life of me find any label of R04 on the panel itself.
Thx