Why does my 1988 silverado blow the heater fuse when I engage the 4wd?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

Fuses That "Blow" Repeatedly

Without being able to "hands on" troubleshoot the circuit served by the repeatedly blowing fuse, none of us can identify the specific defect which is causing your problem.

Therefore, the following generic answer can be applied to any electrical circuit, whether in a vehicle, or in a building, whether direct current [DC], or alternating current [AC].

Fuses [and Circuit Breakers] are safety devices designed and installed in electrical circuits TO PROTECT the conductors [wires] and other components from short circuit conditions and/or overload conditions which cause an extremely large flow of electrical current [measured in Amperes], which causes overheating of the conductors that results in damage to the insulation and the conductors.

And in a worst case scenario, the probability of a FIRE which could destroy the vehicle, house, or other structure in which the circuit is located.

When a fuse or Circuit Breaker [and replacement fuses, or repeatedly "tripping" Circuit Breakers] "blow," especially if it happens repeatedly, is an indication of an UNSAFE CONDITION in that circuit, usually a short.

The fuse or circuit breaker is doing what it was designed, intended, and installed to do; that is to protect the conductors and components of the circuit which it serves.

The proper "fix" for this issue is for a qualified technician, who knows what he or she is doing, to troubleshoot the involved circuit, find and identify the defect, and make proper repair [s], BEFORE replacing the fuse again [with the properly sized fuse or before resetting a circuit breaker].

Some ignorant few people will suggest installing a larger fuse or breaker to solve the problem, BUT that will only increase the hazard, not correct it.

Do not follow "bad" advice by installing a larger fuse in a misguided attempt to correct the problem. To install an oversized fuse would almost guarantee damage to the wiring and the probability of an electrical system fire.
1 person found this useful

Why would the ABS and heater blower fuse keep blowing out?

Answer . WEll, Since the ABS isn't as wire intensive as the blower motor and the blower motor is constantly turning, my first inclination woule be to disconnect the blower motor assuming a shorted out motor. This should be much easier than tampering with the ABS and much less detrimental if that ( Full Answer )

On a 1994 Suburban k1500 4wd the air stopped working the clutch is not engaging the fuse by the steering wheel looks ok is there another fuse somewhere?

Answer . \nIf the system is low on refrigerant the low pressure switch will shut the compressor down. If you run a jumper wire across the two terminals on the low pressure switch on the dryer ( long silver canister on passenger side rear)you will kick on the compressor and be able to add refrige ( Full Answer )

What do you suggest you check on a 1988 Honda accord dx that blows cold air when the heater is on.?

Answer . \nIf the engine is not getting to operating temperature replace your thermostat( located at the lower end of the top radiator hose in the water outlet on engine. If the engine IS reaching operating temp, take your hand and feel both heater hoses( they are 1/2"+ hoses that go thru firewal ( Full Answer )

My heater will heat but not blow in my 1997 ford escort and the fuses are good?

Answer there is a relay under the hood of the car located near the battery, i recommend replacing all of them cause usually if one goes out the others will be shortly following. I was wondering if that fixed the problem for you. I own a 1997 Ford Escort. I have had the blower quit on me twice or ( Full Answer )

1994 Jeep Cherokee heater blower fuse blows only when AC is On?

Answer . one question to be asked. Dose the blower motor run with the heater. If it dose then the system that control the vents opening and closing is probly the cause. If no then I would look for a short, first spot to look is in the switch. If the vehicle has a slide type of control, then ( Full Answer )

Why are the heater fuse keep blowing out on your Oldsmobile regency?

Answer . \nthe blower is located in the engine compartment on the fire wall, passenger side.\ncheck the wires there for cracks or wear you may have a short there. you may have to use\na volt meter and try a continuity test to ground to single out witch wire.\nhope it helps

What causes the horn and flasher fuse to blow out every time you try to replace it on a 1984 Toyota 4WD pickup?

Answer . \nThe reason they are blowing, as soon as you install them, is because there is a short somewhere, in the flasher/horn wiring. Have you or anyone else, done anything electrical, to the truck lately, added something or tapped into the flasher/horn circuit for any reason. There is usually ( Full Answer )

What makes your hot water heater fuse blow out?

Answer . \nThis is a shocking answer but one of the heaters may have a break in it's heating element liner and be the culprit. You have to cut the AC power to the heater and then remove both sides of the electrical connections on the heater elements. \n( Most times there are two) with a ohmmeter ( Full Answer )

A 1996 grand am keeps blowing fuse when you turn on heater?

Answer 1 . Not being familiar with your make and model, this answer will be generic in nature.. For ALL vehicles, and even any electrical system, the "blowing out" of any fuse indicates an overload of the circuit.. That overload can be the result of a short to ground [in one of the conductors ( ( Full Answer )

1988 ford mustang wont blow out hot air of heater relaced thermostat?

With engine warmed up and running, open the hood, locate bothheater hoses, feel each heater hose with your hand. If both hosesare equally hot, I would suspect you have a temp blend doorproblem. Replace the temp blend door actuator. If one hose is hotand the other is only warm or cool, I would suspec ( Full Answer )

F250 4wd will not stay engaged?

That can be a problem with the fuse, the switch might be faulty.The motor at the transfer case might be unplugged.

Why does the 4wd not engage in your 2002 vitara?

A computer board went on my 2001, (1000 bucks! Yikes) but the mechanic by passed it and put a toggle switch on the console for 50 bucks. Shift into 4wd hold toggle switch for a few seconds and away we go in 4wd.

Why Heater on 2001 Chevy Silverado blows hot air all time?

I have a 2001 "Tahoe" that was doing the same thing. If you had the A/C on and moved the temperature just a little towards HOT, it put out heat, wide open. You could not turn the HEAT off until you cut the vehicle off and let it sit for a while. Then the temperature motor would "reset" itself. I end ( Full Answer )

How come your heater blows cold air in a 2000 silverado?

The heater might blow cold air in a 2000 Silverado because thethermostat is sticking and not changing from cold to heat. Thethermostat is usually located in a hose that leads from theradiator to the motor.

Fuse blows on 1997 pickup when put in 4wd?

Hard to say exactly but most of the time when a fuse blows it is cased by a short to ground...this is where a power wire comes into contact with a ground such as the vehicles body or frame...I would check for damaged wires going to the transfer case actuator motor if the vehicle is equipped with one ( Full Answer )

Why does your 95 Silverado keep blowing the stop hazard fuse as soon as you replace it?

Fuses That "Blow" Repeatedly . Without being able to "hands on" troubleshoot the circuit served by the repeatedly blowing fuse, no one can identify the specific cause/defect which is causing your problem. . The following generic answer applies to any electrical circuit, whether in a vehicle o ( Full Answer )

Where are the heater control fuses on my 92' silverado 4x4?

Check right about where your left knee is, just under the dashboard. It should have a plastic cover over it that you pull forward. The fuse should be 20A and right up at the top in the center. At least that is where my '92 C2500 Silverado 2x4 has it. ;-)

Why does your 1988 gmc keep blowing ecm-ign fuse?

Fuses That "Blow" Repeatedly Without being able to "hands on" troubleshoot the circuit served by the repeatedly blowing fuse, no one can identify the specific cause/defect which is causing your problem. The following generic answer applies to any electrical circuit , whether in a vehicle, or ( Full Answer )

Why does a 1995 Buick Riviera keep blowing the heater fuse?

Fuses That "Blow" Repeatedly Without being able to "hands on" troubleshoot the circuit served by the repeatedly blowing fuse, no one can identify the specific cause/defect which is causing your problem. The following generic answer applies to any electrical circuit , whether in a vehicle, or ( Full Answer )

93 buick le sabler turn on light and light and heater fuses blow out.?

Fuses That "Blow" Repeatedly Without being able to "hands on" troubleshoot the circuit served by the repeatedly blowing fuse, no one can identify the specific cause/defect which is causing your problem. Therefore, the following generic answer can be applied to any electrical circuit , whether ( Full Answer )

Heater fuse for 1988 Pontiac firebird 2.8L 25 amp keep blowing?

Fuses That "Blow" Repeatedly Without being able to "hands on" troubleshoot the circuit served by the repeatedly blowing fuse, none of us can identify the specific defect which is causing your problem . Therefore, the following generic answer can be applied to any electrical circuit , whethe ( Full Answer )

Why car heater keep blowing fuse?

maybe because the heat is to high for the fuse to bear. You probably have it on all the time If it blows as soon as you turn it on, it is a dead short, pinched wire, bad blower motor. If it takes a while for it to blow, it is probably the blower motor going bad causing a strain and drawing more cu ( Full Answer )

Why does the ecm-b fuse blow on a 1988 s10 4.3?

Check for frayed wires at the throttle body where the air cleaner assembly mounts. This is a very common problem. Repair the skinned or frayed wire, install new fuse, and hit the road!

Why does my 1500 watt heater consistently blow my 15 amp breaker fuse?

At 120 Volts your heater is drawing about 12.5 Amps. If your house only had 120 V then it would draw 13.6 Amps. Problems could be 1.) Other devices on same circuit. 2.) Internal short in the heating element that reduced resistance and increased current. 3.) Faulty heater in that it really delivers ( Full Answer )

How do you engage 4WD on a RAV4?

If you are in a rough-terrain area, you can press the "lock" button and it will turn on. Once you hit 25 miles and hour, the computer will turn that off and not turn 4WD back on until it senses that it needs to (slipperiness, etc.).

Why are fuses blowing for the heater on 2002 Pontiac sunfire?

I can't give you a real specific answer, but fuses blow because something is drawing too much current. The major electrical part of the heating system is the blower. There might be a shorted winding in the motor, or maybe the motor bearings are going bad and are dragging. This can cause an over-curr ( Full Answer )

How do you engage 4WD in 2001 Wrangler?

Depends on if you have the electronic or manual transfer case. Theelectronic ones, they advertise as "shift on the fly" capable, butthis is a really bad idea. Either way, put the vehicle in neutral... if you have manuallocking hubs, engage the parking brake and lock the hubs byrotating them clockwis ( Full Answer )