New 3T2357 Switch As (Horn) Replacement suitable for Caterpillar Equipment
- New Switch As (Horn) Replacement suitable for Caterpillar Equipment
- Made to USA Specification
Buy with Confidence: All parts are covered by our warranty
Exact Fit Guarantee
This part is guaranteed to fit your machine.
Wrong Part?
We'll overnight correct part at no cost to you.
Description for 3T2357 Electrical Switch
▶Specification for 3T2357 Electrical Switch
▶Exact Fit Guarantee for 3T2357 Electrical Switch
▶| Dimensions | 1.97x1.97x3.74 |
|---|
-
Customer Service.
I recently had to cancel an order with Propel Parts, and I was thoroughly impressed by the prompt and efficient service I received. Steven handled my request with professionalism and speed, ensuring a hassle-free process. I've purchased parts from Propel Parts before and have never been disappointed. Their consistent reliability and excellent customer service keep me coming back. -
Customer service was great! There was a small problem with the part and they responded quickly and respectfully until was resolved! Highly recommended
-
Science I buy parts from propel parts I don’t have to spend too much down time always on time and good service
-
Will definitely use regularly!
Shipped the exact product we were looking for. Prompt Customer Service. Seamless cross-border shipping -
Great service They respond back very fast always try…
They respond back very fast always try there best to get what I need
Very friendly
Prices are reasonable
If there is a problem they fix it
Been working with them 4 years and hopefully many more
Frequently Asked Questions
What does the 3T2357 Switch As Horn do?
The 3T2357 Switch As Horn is the operator-activated horn switch used in Caterpillar heavy equipment cabs. When pressed, it completes the electrical circuit to sound the machine's horn — an essential safety feature for alerting workers around the job site. A faulty horn switch can be a compliance and safety issue.
What Caterpillar models use the 3T2357 horn switch?
The 3T2357 is found on various Caterpillar dozers, graders, wheel loaders, and other cab-equipped machinery. Compatibility depends on the specific cab configuration. Check your manual or reach out to Propel Parts for help verifying fitment before ordering.
How do I know if my horn switch has failed?
Common symptoms of a failed horn switch include:
- Horn does not sound when the button is pressed
- Horn sounds continuously without pressing the switch
- Intermittent horn operation
- Visible damage, corrosion, or a stuck button on the switch housing
Always test the horn circuit (fuse, relay, and horn itself) before concluding the switch is at fault.
Is the 3T2357 a direct plug-and-play replacement?
Yes. This high-quality aftermarket horn switch is designed to meet OEM specifications, using the same connector and mounting configuration as the original. In most cases, replacement involves disconnecting the wiring harness, unbolting the old switch, and reversing the process with the new one — no wiring modifications needed.
Can I replace the horn switch without removing the entire steering column?
In most Caterpillar cab designs, the horn switch is accessible without full steering column disassembly. However, the exact procedure varies by model and cab layout. Always consult your service manual and disconnect the battery before working on any electrical components.
Where is the horn switch typically located in the cab?
On most Caterpillar equipment, the horn switch is integrated into the steering wheel hub or mounted on the operator's control panel. Its exact location depends on the machine model and generation. Refer to your operator's manual for a clear diagram.
Does Propel Parts ship electrical switches internationally?
Yes, Propel Parts ships worldwide. If you need other electrical components for your machine, you may also want to browse related switches such as the 9G8011 Switch A for Caterpillar Equipment, which covers similar cab-switch applications.

We know equipment downtime costs money, so fast and reliable shipping is a priority at Propel Parts. Orders placed on weekdays before 3:00 PM ET typically ship the same day, with expedited delivery options available for many locations when time is critical.
We ship across the U.S., Canada, and over 130 countries worldwide, helping customers keep machines running wherever they operate. Available shipping methods and delivery estimates are shown at checkout so you can select the option that best fits your timeline.
Tracking information is emailed within 24–48 hours after your order is processed, giving you full visibility from dispatch to delivery and peace of mind that your parts are on the way.

Our refund policy is simple. We offer a 30-day, no-hassle return policy, and we make every effort to provide the best service and highest-quality parts possible. If you’re not fully satisfied with your purchase, you may return it within 30 days for a refund. Full details are available on our Returns Policy page.

Buy with confidence. All parts from Propel Parts are covered against material or manufacturer defects for 12 months from the original invoice date. We stand behind every part we sell, so you can count on reliable performance and dependable support. Full details are available on our Warranty Policy page.
Exact Fit Guarantee®
The right part — or we'll make it right.
Order Normally
Know your part number? Simply place your order.
Not Sure?
Place your order, then send us your serial number before it ships.
We'll verify fit.We Make It Right
Wrong part? We'll make it right.Fast. At our expense.
Worldwide Shipping





