743 temp gauge never worked ? Fuses?

[fyredetcv]

Ok trying to get this 743 with kubota fixed up. Just put cab heater core in. working good then blew fuse for blower. Lights went out too ? what are the 2 fuses supossed to be for , what size should they be ? Also temp gauge never worked and while im at it would be nice to fix. Im assuming the heater fan motor was to much current for the fuse (was 10 amp) hooked blower to unused red/wht 12v+ in wiring harness under seat. Dont know if thats what it should be (fuse size).Light comes on to temp gauge but needle has never moved and all the way to the left . Should i look at the gauge itself or is there a sending unit that could be bad ? Where would the sending unit be at if there is one ? Thanks again for any and all help in advance, Kevin.

 

[donald73d]

Find the temp sender and ground the wire to a good ground. With key on it should go to full scale. If it does then your wiring & gauge are OK. With engine warmed up and key on, connect the base of the sender to a known good ground. If that makes a difference then the sender is not grounded properly. If it does not, then its probably the sender. If yiu are adding stuff, you probably have to add a new fuse connection.