12V Glow Plug Timer Relay 8970405010 for John Deere 27ZTS 50ZTS 4100 – 6-Pin
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
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.
| Brand | Model / Engine | Application Notes |
|---|---|---|
| John Deere | 27ZTS / 35ZTS / 35C ZTS / 50ZTS | Mini excavators |
| John Deere | 4100 / 4100G / 4100H | Compact tractors |
Product Overview
The timer relay controls how long the glow-plug circuit remains energized during cold starting. A failed relay can cause no preheat, excessive preheat, intermittent cold-start problems or glow plugs that remain powered longer than intended.
Replacement listings associate this family with John Deere 27ZTS, 35ZTS/35C ZTS, 50ZTS and 4100/4100G/4100H machines, and cross-reference 8970405020, 31A66-15100 and 897105-7900. Connector layout should be checked before installation.
Key Features & Performance
- 12V glow-plug preheat timer relay
- Common 6-pin configuration
- Cross-references 8970405010, 8970405020, 31A66-15100 and 897105-7900
- Used on selected John Deere compact tractors and excavators
Technical Specifications
| Part type | Glow-plug timer relay |
|---|---|
| Voltage | 12V |
| Connector | 6-pin family |
| Primary reference | 8970405010 |
Part Numbers & Cross-References
8970405010, 8970405020, 31A66-15100, 897105-7900
Frequently Asked Questions
What should I verify before ordering?
Compare the relay number and 6-pin connector arrangement to the original.
Is this an OEM part?
No. This listing is a replacement component. Manufacturer names, model names and reference numbers are used for identification and compatibility; compare the original part and equipment details before ordering.