ST200 Blowing 7.5amp fuse for dash lights can you help??

Replaced fuse with a 30amp and wiring under scuttle near pollen filter melted, i repaired wiring loom but still blowing fuses but not melting wiring anymore!

When i bridge fuse box there is a large load put on engine (revs drop) and dash lights work!

Anyone come across this problem??

Suspect:switch, dash panel, centre console or possible short on wiring between these items. Can you help


Please email me : Reidv6er@hotmail.com

 

Somewhere in the circuit must be shorted to earth between the fuse and the lights. Is the fuse only for the dash lights or does it protect any other circuit?

Best bet would be to disconnect all items on the circuit and replace the fuse. If it blows then it’s a wiring problem, if not start plugging the components on the circuit back in, if the fuse blows then you will know where the short is. Would also make the job easier if you had a wiring diagram.

You could also try connecting a bulb across the fuse contacts to save you keep blowing fuses. The bulb should light up as the circuit is shorted to earth. Remove components on the circuit one by one and see if the bulb goes out/goes dimmer. Also try moving the loom around at various points whilst watching the bulb, if it goes out/flickers then you are in the area of the short.