Toggle switch attached to battery or starter

• Chevrolet C/K( k= 4wd) pickups.
• Chevrolet Silverado?
• Chevrolet Suburban(no)

USA car or not in N.America at all??????????
which one is it, Sierra is a sub model class not a truck actual.
I will guess C1500????? pickup truck? 2wd./
scan the PCM yet, using any OBD2 scan tool for DTC errors?


it is not bad, 99% are not bad so no need to find it.
why not post a problem and not hunts.
the service manual on the car and google searches ends the hunt.



the knock sensor allows the PCM to tune spark timing to use poor grade fuel. and not allow knock and ping. it does that endlessly.
but if say you heard the engine ping, that is a dead EGR

PING (knock or detonation) is caused by poor fuel and crazy high combustion temps.
The EGR system cures it. (and must be cleaned or fails)
some trucks run spec cams that stop PING>
and some use those and a knock sensor..
it is a microphone ,sensor. and if engine bearings pound load

the KS1 sensor lies., to you. (and the PCM)
example rod knock or piston slap noises.


what truck is it,from USA 1998 list
1998 (sierra is a sub class not an actual truck) see?
Toggle C1500 PICKUP
Toggle C1500 SUBURBAN
Toggle C2500 PICKUP
Toggle C2500 SUBURBAN
Toggle C3500 PICKUP
Toggle FORWARD
Toggle JIMMY
Toggle K1500 PICKUP
Toggle K1500 SUBURBAN
Toggle K2500 PICKUP
Toggle K2500 SUBURBAN
Toggle K3500
Toggle K3500 PICKUP
Toggle P3500
Toggle SAFARI
Toggle SAVANA 1500
Toggle SAVANA 2500
Toggle SAVANA 3500
Toggle SONOMA
Toggle T SERIES TRUCK
Toggle TOPKICK
Toggle YUKON
the knock sensor
looks like OIL sender, or desk knob round.
newer 4.3L has 1 KS1, and KS2 sensors one per bank.
1998 , it is one, sensor, rear left of distributor.
left means (USA drivers left side) perspectives.

first google hit found it.




dead egr , cleaned or replaced seen here


https://www.rockauto.com/en/catalog/gmc,1998,c1500+pickup,4.3l+v6,1304659,exhaust+&+emission,egr+valve,4968

You can also do it off the ignition solenoid under the hood. I rigged my friend's 85 RamCharger that way once. His key switch went bad and he needed a way to get home. Look for the post that has the IGN marks by it then run a jumper to the hot post for the battery. You should see your gauges come on when you have done it right. You will need a toggle switch for the ignition system and a push button for the starter. You will need to hook up the jumper for the ignition circuit to the toggle switch on one side and the battery side of the toggle switch to the other side. The push button will be for the neutral safety bypass. if you do your wiring right you should have a toggle switch that turns on you ignition system and a push button switch that engages your starter. Make sure the wire is heavy enough for the voltage amount for the toggle switch

Toggle wont work. You need a momentary switch. Personally I would remove the key cylinder and dump all the pins out so anything could turn the ignition. Then you dont need to re-wire anything.

Fitting a toggle switch for starting used to be a budget method of overcoming starter switch and other problems on older cars but will not work where the standard ignition key contains a transponder.

You haven't provided enough detail for a good answer but wiring a (spring return type) toggle switch to operate the starter motor is relatively easy and requires only a battery live and a wire to the starter solenoid or to the coil of the starter relay if you wish to use a relay.
Mostly these wires can be extended from the existing harness to the new switch.

Your problem seems to be a faulty solenoid. The solenoid is a little monster that lives on top of the starter motor, and its job is twofold. Firstly, it supplies full battery power to the starter motor, and secondly it drives a gear on the starter to engage with the engine flywheel.
Now, your problem. The first guess could be the ignition switch, but fitting a toggle seems like a fairy tale answer. Check the starter solenoid to see if there is a frayed wire on the thin wire that connects to the starter, or possibly a frayed wire on the battery cable that is shorting to the small connector. Otherwise, I have seen the terminal of this small wire actually become loose and turn in the direction of the battery cable, which is also connected to the solenoid. A short here will cause the problem you are describing.
Finally, the solenoid could have a short circuit inside the body, which means replace the solenoid.

-Why you want to hook up a switch to the fan...? You want to turn it on when you want?
-No Problem. Here some basic installation.
-Connect the hot wire to the positive (+) battery terminal.
-Connect both left over wire to the switch. Then connect 1 wire from the other side of the switch to ground. you should be good to cool down.

Good lucj

Mai

if there is a coil on that model bring small wire from positive on battery to positive side of coil and see does it keep running ,if it does check ignition switch and wiring to switch

Here is a wiring diagram of how you should by-pass that cooling fan by using a toggle switch, and you can get a fuse holder and use a 30 amp fuse instead of a 30 amp circuit breaker, but you should use the circuit breaker since you are no longer using a relay, and if there is a voltage spike the circuit breaker will reset itself, and a fuse will blow out and you will have to change it. Most auto parts stores will carry the 30 amp toggle switch and circuit breaker, also be sure to use 10 ga. wire and do not forget the wire connectors that you will need to attach the wires to the toggle switch, the circuit breaker, and to the battery as well as the connection to the cooling fan wires.

This wiring diagram is very basic and you should be able to follow it with little difficulty, and you should also dis-connect the cooling fan at the wiring connector to the cooling fan and connect the by-pass wiring directly to the cooling fan motor so that you do not run voltage back through the stock system. Let me know if you require further assistance.

If your ignition switch is bad in your steering column, and the starter does not engage when the key is turned forward, then this is a quick fix for you.
BE SURE THE BATTERY IS DISCONECTED BEFORE YOU START WIRING. You can run some heave gauge (18 plus, and about 12 feet of it) wire to the top mount and the rear mount on the starter solenoid (one end of the wire to each, making a loop) Run the wire into the interior of the truck, and then install a toggle switch in the loop of wire. You will still have to turn on the key to engage the motor, but it will not start until you flip the toggle. That should get you by until you can replace the ignition switch in the column.

Check the fuel pump relay