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SKU:
NLT1Z00761
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393209R1 Glow Plug Switch for Farmall IH 460 560 706 Tractors
$22.99
In Stock
$22.99
Sale price
$22.99
Regular price
This dash-mounted glow-plug switch replaces 393209R1 and 189158M91 on compatible International Harvester and Farmall 460, 560, and 706 diesel tractors.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- International Harvester 460 diesel tractor
- International Harvester 560 diesel tractor
- International Harvester 706 diesel tractor
- Farmall 460 diesel tractor
- Farmall 560 diesel tractor
- Farmall 706 diesel tractor
Product Overview
Hard cold starts are not always bad glow plugs. If the plugs and wiring test correctly but no power reaches them while the control is held, the dash switch may be burned or mechanically worn.
This momentary control lets the operator energize the preheat circuit before cranking. It uses a 5/8-inch dash or firewall mount in the listed applications; verify the heavy-current terminals and mounting depth because a glow circuit draws far more current than a signal switch.
Key Features & Performance
- Momentary control for manual diesel preheating
- 5/8-inch dash or firewall mounting stem
- Cross-references 393209R1 and 189158M91
- Useful for a switch that will not pass current under load
- New aftermarket part
Replaces Part Numbers
- 393209R1
- 189158M91
Common Uses
- Restoring manual glow-plug power before a cold start
- Replacing burned or loose high-current switch contacts
- Repairing a switch that heats only when pushed or wiggled
Technical Specifications
- Product Type: Glow Plug Switch
- Primary Application: International Harvester and Farmall diesel tractors
- Package Quantity: 1 switch
- Condition: New
- Replacement Type: Aftermarket
- Mounting Stem: 5/8 inch
- Control Type: Momentary glow-plug switch
- Electrical System: Match original tractor circuit
- Reference Numbers: 393209R1; 189158M91
- Condition: New aftermarket
Installation & Fitment
- Disconnect the battery ground cable
- Label the heavy leads before removing the old switch
- Clean heat-damaged terminals and replace weak cable ends
- Confirm glow-plug current and release of the momentary switch after installation
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Model, production date, serial number, connector, dimensions, installed options, and previous repairs can affect fitment. Compare the original component and reference information before purchase.
Frequently Asked Questions
Q: Why does the switch or wiring become hot? A: Loose connections and excessive resistance create heat; repair damaged terminals before installing the new switch.
Q: Will this cure worn-out glow plugs? A: No. Test the plugs, bus bar, cables, and battery condition as part of the same diagnosis.
Q: How do I confirm this is the correct part? A: Match the tractor model, 393209R1 or 189158M91, mounting stem, terminal size, and momentary operating action.
Q: Is this supplied by the original equipment manufacturer? A: No. This is a new aftermarket item. Brand, model, and part numbers are used only to identify compatible applications.
Part Summary
keywords: 393209R1 glow plug switch, Farmall 460 preheat switch, IH 560 diesel glow control, Farmall 706 cold start switch, 189158M91 replacement
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.