Mercedes e220, horn, heater fan and electric

Here are a few things you can check to see why the horn, fan, and defroster in your 1986 Isuzu Trooper are not working: Check the relays: The relays may be faulty. To check the relays, disconnect the wiring from the relays and test them with a multimeter. If the relays are faulty, replace them with new relays. Check the wiring: The wiring may be damaged or corroded. Inspect the wiring carefully for any signs of damage. If you find any damage, repair or replace the wiring. Check the fuse: The fuse may be blown. Check the fuse box for a blown fuse that is labeled "horn," "fan," or "defroster." If the fuse is blown, replace it with a new fuse of the same amperage. Check the alternator: The alternator may not be charging the battery properly. This can cause the electrical system to malfunction. Have the alternator tested to see if it is working properly. Check the ground wires: The ground wires may be loose or corroded. This can cause electrical problems. Inspect the ground wires carefully for any signs of damage. If you find any damage, repair or replace the ground wires. If you have checked all of these things and the horn, fan, and defroster are still not working, you may need to take the Trooper to a qualified mechanic for further diagnosis and repair. In the meantime, you can use the Trooper for very short distances, but you should avoid using the horn, fan, or defroster. This will help to prevent further damage to the electrical system.

Hi george wilson

Check your fuses...you probably have one that is blown/defective
Bud

The fuse that you are looking for is fuse #11 it is a 7.5 amp fuse, you could also have a bad heater control module. Have a good day.

do you have a standard key or a smart key?

its the thermal fuse on the heater risistor, if you remove the blower motor from under the bonnet and remove the heater resistor you can then buy a 79p thermal fuse from maplins and solder it on i have done it on all my espaces

scrap it treat yourself to a newer car you only live once x

Most likely to be a faulty resistor block, which has 3 resistors and a thermal fuse controlling fan speeds 1,2 and 3, maximum speed 4 by-passes the resister block. It may also be poor electrical connections to the resistor block caused by overheating. Renault ask for approximately £350 to carry out repairs, a replacement resistor block will cost £50. If you decide to carry out the repairs yourself, be advised that if you are not competent to carry out such work you, could cause electrical damage or worse an electrical fire.

Most likely the switch or the fan motor it self.

Horn fuse should be labeled on the fuse block. If it's not, easiest way to check is to just check them all. Use a test light and probe the back side of each fuse on both ends, till you find one that only has power on one side. Horn works with key off but I generally check with key on. Also, you have a horn relay (should be in the power distribution center (basically another larger fuse box, usually on the right fender under the hood. If all else fails, run a "hot" wire right to the horn & make sure it works. Horn "switch" is actualliy part of the signal mechanism and internal parts within the steering column...though these sometimes develop dead spots, it's least likely that it is the source of your problem.