Fuse # 20 keeps blowing - 2000 Land Rover Discovery

I am wondering if the fuse blows instantly or whether it lasts a while?

Fuse ratings for cars are usually mean or average values so a 20 amp fuse needs roughly 40 amps to cause it to instantly fail. I have not heard of a cigarette lighter needing that much current so I guess there is a fault that should be located and cured before you have a fire.
Maybe it is the element that is faulty...

I think fitting a 25 amp fuse would be slightly foolish...

May be you may have a bad starter if it is the starter fuse.

You should always replace fuses with the same rated fuse as the one removed. Most likely if it keeps blowing the same fuse something in that circuit is directly shorted out.What fuse is it that keeps popping?

bad ground to fuse box

My car stopped running without any warning, its a 2005 ford focus, 2.0 and the 20 amp fuse for the engine management keeps blowing, it's number 9 in the panel and I have replaced it twice, both times it blew again, any tips? Also the odometer reads ------ and that's it.

if it keeps blowing the fuse you have a short in the wiring

if its blowing the fuse, it might be a a bad relay that is drawing two many amps to keep it running. replace it

there's a grounded wiring on it that's why it keep on blowing your fuse check the wiring.

hmm. lt look like there are poor joints in your wiring specially the groung wire. check the diagram of your auto. check the unit diagram for which the fuse blows. usually the fuse blow when there is a short circuit. if you look around you will find it.
good luck
ehsan.

ok put in a 20 if that blows put in a 25 do NOT go over 25A fuse if it keeps going out let me know