Front Blower Fan Advice

[Jordan F]

Hey Everyone,

Need some eyes here on my front blower system. So upon first inspection, found that the connector between the front blower and its grounding wire were disconnected, but then also noticed that the female connector was melted and warped from previous owner. Not sure if this was a case of someone trying to shove the two connectors together and them shorting out or something else.

Anyhow, aligned the female prongs back and connected to the male connector and fan still doesn't work, except on highest setting comes on for a couple seconds pretty weak and then stops.

So I took the blower components out an apart, and have some questions about my findings.

1) The Fan Motor, looks like it has a large drainage hole so assuming someone has replaced this previously. After opening up the fan motor, one of the brushes was not contacting the centre piece it rubs on, so that must be one of the issues. Secondly, I can smell a faint burnt smell within the motor at all times and the copper wires are mostly coated in black. Is this an indication of a bad overheated fan? Lastly, When trying to spin the motor, is does not spin very nicely, it spins for about 2 seconds but comes to a stop, is there not a bearing at the base of this that can be oiled, or does it just spin within the lower aluminum casing?

2) I removed the fan resistor unit, and am not quite sure how to test it. Any recommendations are appreciated, with testing the three prongs, what setting on the multimeter I should use? I also lifted up the circuit board and there is alot of corrosion under there and it looks like one of the connectors soldering is disconnected.

Here are some pictures of what im talking about, because that probably didn't make sense

https://cdn.shopify.com/s/files/1/2195/ ... 7646029081

https://cdn.shopify.com/s/files/1/2195/ ... 7646029081

https://cdn.shopify.com/s/files/1/2195/ ... 7646029081

[g8dhe]

Yes as regards the fan there is a bearing and it needs cleaning and oiling out as per this set of images;
http://www.g8dhe.net/bongo_images/air_fan_cleaning/

The cause of the water getting into the motor is the windscreen scuttle plate the drainage hole/tube will have been blocked, clean it out central under the windscreen.

You have the modern Climate Control system. which doesn't use resistors but a transistor and a bypass relay which is why it operates at the highest speed only when the relay bypasses the transistor which has blown, you can either replace the module as a whole at significant cost or replace the transistor alone at a much better price https://nikkoe.com/catalogsearch/result/?q=2sd1525
See here for the diagram Flash needs to be enabled on your browser

[Jordan F]

Hey Geoff!

Thanks so much for your reply. I am trying to understand the wiring diagrams here, could you explain which items on the diagram you linked is the fan motor, the bypass relay, and the transistor?

So since I don't have a resistor, that piece that I linked in my post above is a transistor? It is labelled as a resistor in the bongo shop here https://bongoland.co.uk/product/heater- ... e-control/, so just a little confused about that.

Thanks Geoff!

[g8dhe]

The Fan motor is the connector G3-06,
The bypass relay is G3-05,
transistor is G3-04.

G3-07 is the main relay for turning the fan motor on/off.

The diagram you showed is for the manual control system which does use a resistor pack and not a transistor to control the speed, when you look up spares then they often refer to them as being the same device but differing modules dependent on control type in the link above that is actually the transistor control module used by the Climate Control version, whilst the version links to the older sliding control manual system https://bongoland.co.uk/product/heater- ... ck-aircon/ they fit in the same location but work in a totally different way!