blade fuse values please!

Has your car got air con?
If so then do the air con fans come on?
Dose your radiator fan work.
I had the common problem of the air con fans not working on my leon which when I repaired with two resistors managed to blow one of the fuses you are talking about. I believe the one you are talking about is also a 40 amp and could be the fuse for the air con fan circuit or your radiator fan.
Hope this may help you
Glynn

zygoma999 said:

cheers glynnd. my toledo has got aircon and when i turn it on both fans work as they should. everything seems to be working ok, no warning lights so i presume that the fuse has not blown despite how it looks! are you sure that its a 40 amp fuse - if so, i'll order one? any other idea what that fuse protects?
cheers again.

Click to expand...

Tbh I cannot b 100% sure I am correct but its a 40 amp fuse that controls the fan for the ac and the rad fan.
Noticed anything thats stopped working?
Difficult with the rad fan as it does not come on much and is very quiet.
Make sure its working b4 summer gets here!
Glynn

First let's be certain we're talking about the same thing here.

Fusebox mounted on top of the battery, has positions for five big fuses and three smaller ones. The big ones are what I'm assuming you're calling "blade" fuses, but I think of the smaller ones as blades, because they have two big blade connectors on the bottom that fit into sockets on the fuse panel. The really big fuses in the battery-top box are unlike any other fuses I've seen, metal strips that are screwed down at each end, to make sure of good contact. These are high-value fuses, a lot of current is going through them, so good contact is essential.

All the books I've seen show five screwdown fuses in there as well, but mine only has four of the positions occupied, as does yours I presume.

The fuse values on my 51-plate Toledo TDI 110 SE (which has aircon) read 100A, 100A, 40A, 50A left-to-right. Above and to the right of them are three plug-in blade fuses, all green 30A ones.

Pics:

Battery-top fusebox location


Battery-top fuses, close-up


Battery-top plugin fuses


Fuse positions are labelled as follows in the electrical diagrams.

Standing in front of the car, going from left to right, first the flat screwdown metal strip fuses


and the plugin blade fuses are


So in mine at least the one that is missing appears to be the Glow Plug Heater.

Just for reference, what engine code is yours? Mine is ASV, but yours being earlier might be AHF or something?

I'm sure I've seen other threads about water getting into this box and corroding the contacts, which leads to higher resistance, which generates heat as the current flows through, which eventually blows the fuse. I think this particular fuse location gets wet first or something?

Checking where those fuses are wired to is not always easy.

S177 is the Alternator, that's easy to see. S176 seems to be the main power feed to the cabin for instruments, inside lighting, air blower etc etc. No easy way to check for sure.

By poring over the wiring diagrams I think that S164, third from the left, is the radiator fan high power feed, as the red/black wire colouring matches the diagrams on the rad fan control and aircon system pages.

That leaves the last one, in the position for S163. The wiring diagrams show this leading to a red wire which feeds the glow plugs, so the annnotation in the books is misleading for the case when the fifth fuse is not fitted.

The wiring diagram for fuse S162 shows a red wire leading to a pair of relays controlling extra glowplugs set into the coolant flow, and used to heat up the coolant to operating temperature quickly. When they are fitted I think they show up on the righthand end of the head, so I'm pretty certain I don't have them. Whatever the manuals might say.

So 50A is correct for S163, but it feeds the cylinder glow plugs and not "engine management". S162 is missing on our cars, as is the associated system, the coolant heater (sounds odd doesn't it) which I guess is a cold-climate add-on for markets like Norway and Sweden.

If its not blown remove it and see whats not working then
Glynn