Maximum alternator rating is the maximum charging current capability of the Battery Isolator for both batteries.

Maximum current per leg is a half of the maximum alternator current rating

Use the four terminal Battery Isolator (Cole Hersee 48122, 48092 or 48162). The fourth terminal (#10 stud) is used to excite the alternator .It supplies +12V to the alternator when the ignition switch is turned On.

The M-412 type is all brass construction and the 4622 has steel rivets in them.

The breaker or fuse should not be rated for more than 25A per breaker or fuse with the total of all items used not to be more than 150A.

If you need a replacement, take a look at the switch that's already there. Does it mount on or through the floorboard, or on the panel (dashboard)?

All floor switches are SPDT On - On, depress - release for low beam, depress - release for high beam. All are made from corrosion-resistant diecast metal with moisture-repellent insulators.

Variations are in the location of the mounting holes, and the nature of the terminals ( lead, blade, bullet or screw).

Panel: we suggest No. 7112
On the floorboard: (all are 3-blade)
7702
7762
7776
Through the floorboard:
7700 we recommend this one where the switch may be exposed to roadsplash.
7769
7770
7771
7774
7775
7784
7786
7787
7789-02
Check these items in our interactive catalog: they have listings for the OEM parts that they replace.

74600-02 Electronic Dimmer

Solid state devices dissipate very little power.
They are either fully on or fully off. The power dissipation of a Rheostat Dimmer is proportional to the maximum load current, independent of the position of the dimmer. The energy used to overcome the resistance produces heat.

Electronic dimmers are not load sensitive.
Changing the load (for example by adding or removing a light) will not produce a noticeable difference in brightness of a light.

Electronic dimmers are considerably more efficient.
There is less loss in the feed cables and substantially less loss (more than 50 times) in the dimmer unit itself. It therefore doesn't generate a noticeable amount of heat

Typical Electronic Dimmers can supply power to motors and make them run, but the dimmers aren't designed for it. Connecting inductive loads to dimmers can damage them.

There are Electronic Dimmers designed for inductive loads. They are application specific. For details contact engineering@colehersee.com

A switch creates a situation that is all or nothing. That is, it allows current to flow or not to flow. The current that flows is not graduated, and is suitable to actuate a pilot light. A sender gives a variable signal of graduated intensity that is suitable to actuate a gauge, indicating a certain level.

Our temperature switches have a mechanical contact that is actuated on or off with changes in the temperature surrounding the switch. A temperature senders have a resistive element that varies depending on the surrounding temperature. The temperature sender provides a resistance value to the gauge causing the gauge to fluctuate.

Yes. Contact us to determine the part to fit your application. Sales@colehersee.com

In most cases yes, if we do not already have a suitable part in stock.

In an insulated switch, the contacts are isolated from the chassis ground or engine block.

In a non-insulated switch, the contacts short to the chassis ground or engine block when the switch makes, essentially providing a ground connection to your load.

No. These switches are not rated for 110V AC application. Have a knowledgeable electrician determine suitability for your application.

No. You need a temperature or pressure sender. Check our online catalog.

Generally Yes. These switches have an On/Off rated pressure and a higher safe burst pressure. For your own safety your system pressure should be less than the burst pressure. Before you install a pressure switch, you should always determine your maximum system pressure first.

Yes.

No. Contact us for the proper part for your application. Sales@colehersee.com

You've come to the right place for selection. We have about 50 of them! We have 12V, 24V, and 36V continuous or intermittent duty solenoids. We have steel or molded bakelite housings. We have plasticized housings for weather-resistance. We even have a Latching Solenoid, which is energized and de-energized by a momentary switch. We have an Electronic Solenoid rated at 85A continuous that can be used for voltages from 9 to 31. We have a 200A continuous duty solenoid, rated at 12V or 24V DC. We manufacture lots of solenoids!

Oh yes! The online catalog can guide you to them.

Generally, the control circuit for a continuous duty solenoid rated at 12V DC draws approximately æ of an ampere. The control circuit for a 24V DC continuous duty solenoid draws approximately 0.3 amps. An intermittent duty 12V DC solenoid draws approximately 3A, and the 24V DC about 1.2A.

The coil circuit (control circuit) in a continuous duty solenoid is usually energized for long periods of time. Under these conditions the coil will generate heat and within less than an hour the solenoid housing will become hot to the touch. This is normal. Always make sure that all wiring is properly sized for the load it is carrying, that the terminals are the correct size and have been securely crimped to the wire, that the terminals have the proper torque to the solenoid studs. Alternatively, you might be able to use the Latching Solenoid that only needs a one-time momentary actuation to stay in the On position.

Electromechanical solenoids should be mounted on a non-vibrating surface such as a fender well or firewall. They should not be mounted on a surface that vibrates such as an engine, as this may reduce the lifetime of the component. Continuous duty solenoids should be mounted in an area that has ventilation, as the coil circuit normally generates heat. Orientation of the solenoid, i.e. bracket up, bracket down, or bracket at right angle to the ground does not usually affect solenoid performance. Electronic solenoids are much more rugged, because they have no moving parts. They also will stand up to an incredible one million On-Off cycles!

You're not alone. These diagrams should help
1. simple
2. SPST
3. SPDT
4. DPST
5. DPDT

The bulbs are wired inside the switch and therefore cannot be replaced. We use a long lasting bulb so that the need for bulb replacement is unlikely in a normal automotive application.

Except for switches M-493, 5507 and similar switches, none of our switches are officially rated for AC voltage application. While we are confident some of them can, it is totally up to the end user to determine their suitability for such application.

No

No. The ones that are shown on this site are not capable of handling 24V. We do have other switches capable of handling 24V that are not listed here. Please contact us if you need them in quantity. Sales@colehersee.com

Yes. They are rated at 12V, so you must reduce the amp rating by half to obtain the same durability.

es, in most cases. It is possible we make a suitable item already that isn't listed because of its specialized use. Alternatively, we can make it for you. Naturally we have a minimum quantity requirement for special orders.

The switches listed on this site have incandescent lamps. But we do have other switches that have LED's. Contact us if you need a special order with LEDS: Sales@colehersee.com

Yes. Contact us. If it's a standard legend or SAE symbol, there's a chance that it's already available.

They are best mounted on a vertical (or close to vertical) panel. Avoid mounting them on an exposed panel that is more horizontal than vertical.

Sure. We have chromium-plated solid brass knobs in a variety of styles, or plastic knobs. Our plastic knobs all have a metal core that provides a solid connection to the spindle of the switch. You will need to consider shaft size, threads (if any) and symbol or text. Check the online catalog under Accessories/Hardware/Knobs. If you have a Master Catalog, see section Q.

Use our M-630 Push-Pull Switch. It's an On-On switch. Install one in each location and wire them to control the Off-On function of a single load.

Try not to mount it so that it will be exposed to the full force of nature. If it has be exposed to the elements then the preferred mounting is on a vertical panel, rather than being mounted at an angle to the weather. A switch such as our 50066 would be a good choice because it has an o-ring in the mounting stem that gives an added protection against the inclemency of the weather.

Your vehicle has either a dynamic or non-dynamic (coast-to-park) braking mechanism on the windshield wiper motor. If you are replacing a switch, you need to know which type. This is all you need to know. Consult your Vehicle Owner's Manual. For those who need to know how they work, read on...

Dynamic brake:  
Essentially, when you turn the wipers Off, they stop when they reach their park position, but they get retarded electrically to bring the motor to a rapid stop. When you turn the wiper switch Off and the wipers reach the park position (left or right), the armature of the wiper motor is disconnected from the load and immediately connected across ground. The motor then functions as a loaded generator and develops a retarding torque that rapidly stops the motor.

Non-dynamic brake: 
Essentially, when you turn the wipers off, they stop when they reach their park position. When you turn the wiper switch Off the wipers continue to run by a separate set of contacts mounted on the motor, until the wipers reach their park position. At this point the contacts open, removing power thereby stopping the wiper motor. If the motor is not in the park position for the wipers, it continues to run until it reaches the park position and the switch opens as before.

Electronic Windshield Wiper Switches are specific to a type of motor (with or without dynamic parking).

Switches designed to work with dynamic park motors: the PARK wire is blue.

Typical switches:
75600-01 12V DC, controls two motors
75602-02 24V DC, controls two motors
75600-02 12V DC, controls one motor, Packard 6-way
75600-05 12V DC, controls one motor, Packard 4-way
75600-07 12V DC, controls one motor,

7-way connector Switches designed to work with non-dynamic park (or coast-to-park) motors: the PARK wire is green.

Typical switches:
75601-02, 12V DC, controls two motors, Packard 8-way
75601-08, same as
75601-02 without knob Electronic switches have 7 leads ( 2 red leads).

Microprocessor based Windshield Wiper Switches can work with both types of motors. They have 6 leads.

Typical switches:
75600 12V DC, with 8-way Packard connector
75600-04 12V DC, with 6 wire leads 75602-04 24V DC, with 6 wire leads