I've recently noticed the lower fan doesn't come on when the car is turned onto accessory mode. The upper one comes on when it needs too, but that fan has blown 2 30 amp fuses within the past month. Are these fans rebuildable? Also my AC only gets cold when it sitting at idle but as soon as I start to move it heats up. Would this have to do with the fans? AC is charged and checked for leaks. Any help

 

The fans run TOGETHER!!!!!!!!!!!!!!!!!!!!
They are a PAIR and need each other.
If one fails, the LOW is inhibited. The one remaining fan will need to jump to HIGH and blow the fuse.

All the TSBs I post are available for all to read on this forum and on Gus's site.

bob

 

I'll get back with you later as a system test . I planed on overhauling my fan motors to get them more service life so I will look into that specific . Working on a Honda now for someone else and the boneheaded engineers did not get the timing belt tensionsers correct for in service functionality . Got with the Honda dealer mechanic and yep they got it wrong . Changed the design the next year .

 

The major problem with HONDAs is the the engine runs BACKWARD!!!!!!!!!!!!!!!!

bob

 

I'm sure you can get the motors rewound, but when i had a problem, motorcarman suggested getting an a used a x308 off of ebay, slightly different bolt but a 15 min repair and replace andits been a couple of years, cost about a $100 shipped, what's your time worth;-)

 

The X300 A/C system has a self test ( Jaguar shop manual 14 - 10 ) built in that may give you some information with the resulting codes . But it does not confirm proper radiator fan operation .See someones 2 following Youtube videos .



The following test for the radiator fans may or may not be valid for the Jaguar TSB's Bob mentions above . I'll have to integrate the modification into a new test procedure , but in the mean time it gives you something to play with . My car has not been modified yet .

If you want peace of mind that both fans and your control relay module ( located under the car below the engine air filter ) works you can just insert a paper clip in the coolant temp switch connector and the A/C pressure switch connector and watch the fans run without the engine running . Ref X300 Wiring Schematic figure 7.1 . 5 minute test . Low current/power circuit so no arcing or damage concern . Just verified this test with Lady P . With the key in the on not start position the coolant temp switch is located an the radiator very lower left side . Contact the sockets for wire White Blue to Black will give you both fans , White to Black will give you the one left side . On the A/C switch it is the 4 wire connector located on the A/C lines on the aft firewall bulkhead . Contact the White Blue with either of the Black and you will get both fans . This test will only verify the relay module and the fan motors and not the switches themselves .

In terms or fan motor overhaul I was thinking more in terms of brush replacement if that is possible not having taking it apart yet ( tomorrow ) . Thanks for the advice on the 308 substitution .

As to the Honda , the problem was that the timing belt replacement was off 30 degrees by the first mechanic , the second mechanic was off on other things , and then there was the initial engineering of the floating eccentrics of the tensioner not moving freely . Got it straightened out for the customer under the shade tree .

Fixed a lot of Boeings

Thanks , Parker