COIL 12 VOLTS JEEP MB
INSTALLATION INSTRUCTIONS
COILS FOR 12-VOLT SYSTEMS
RESISTOR NOT REQUIRED
1. DO NOT INSTALL these coils on 12-volt systems equipped with a resistor or with resistance built into the wiring harness.
2. SELECT THE RIGHT COIL by referring to the application guide in the catalog.
3. COIL POLARITY MUST BE CORRECT. If the negative battery post is grounded, the coil terminal
marked (-) must be connected to the distributor. If the positive post is grounded, connect the coil marked (+) to the distributor.
4. All connections must be clean and tight. Make sure the coil high tension wire is firmly seated in the coil tower and the spark plug wires are firmly seated in the distributor cap towers
Ignition coil 12 volt
With internal resistor
Ignition coil for 12 volt electrical systems. Suitable for vehicles with L-134 or F-134 engine converted from 6V to 12V, or originally equipped with 12V installation. This coil features an internal resistor, eliminating the need for an external ballast resistor.
|
Voltage 12 volt |
Resistance Internal resistor (approx. 3 Ω) |
|
Application L-134 and F-134 engines |
Fitting Standard mounting on engine block |
Features
- Designed for 12V systems without external ballast resistor
- Primary winding with approx. 3 Ω resistance
- Secondary winding 6,000–15,000 Ω
- Suitable for standard distributor ignition with contact points
- Direct replacement for 12V systems
★ Reliable ignition coil for 12V conversions or original 12V systems. Fitted with internal resistor — no external ballast resistor required.
Application
Suitable for vehicles with 12V electrical system. Intended for Willys MB, Ford GPW, CJ-2A, CJ-3A, CJ-3B and M38 with 4-cylinder L-134 or F-134 engine converted to 12V, or for later models (from mid-1950s onwards) originally equipped with 12V. Not suitable for original 6V or 24V systems.
Installation notes
CAUTION: do NOT use this coil on systems with external ballast resistor or with resistance in the wiring harness. Check polarity: with earth on negative terminal, connect (-) to distributor; with earth on positive terminal, connect (+) to distributor. Ensure all connections are clean and properly tightened. Check that the high tension lead is securely seated in the coil tower.
Compatibility
ONLY for 12V systems. Not suitable for original 6V (WWII MB/GPW/early CJ) or 24V (M38A1) without conversion. Some 12V coils require an external resistor — this coil has an INTERNAL resistor and must therefore NOT be combined with an external ballast resistor. If in doubt: measure the primary resistance (should be 2.5–4.5 Ω for 12V coil with internal resistor).
Historical context
From the mid-1950s onwards, most Willys vehicles switched from 6V to 12V electrical systems. Many WWII jeeps (MB/GPW) were later converted to 12V for improved starting performance and compatibility with modern accessories.
This description was generated automatically. Unsure about fitment? Contact us at info@willys.be.
⚠ Spotted an error in this description? Report it to info@willys.be
This part is intended for the restoration of historic military vehicles. Fitting, aligning, deburring or reworking is part of that work and is inherent to the nature of these goods. Dimensional variation also exists between original vehicles.
Installation requires technical knowledge of the vehicle. Unsure whether this part suits your version? Ask us before purchase at info@willys.be.
ALL_CATEGORIES : ENGINE COMPARTMENT ELECTRICITY MB/GPW, Distributor 6/12V CJ2A, ENGINE COMPARTMENT ELECTRICITY CJ2A, Distributor 6/12V CJ3A, ENGINE COMPARTMENT ELECTRICITY CJ3A, ENGINE COMPARTMENT ELECTRICITY M38, Distributor 6/12V CJ3B, ENGINE COMPARTMENT ELECTRICITY CJ3B
This part fits:
| Model | Years |
|---|---|
| Military jeeps | |
| Willys MB (early) | 1941, 1942 |
| Willys MB | 1942, 1943, 1944, 1945 |
| Ford GPW (early) | 1942 |
| Ford GPW | 1942, 1943, 1944, 1945 |
| Hotchkiss M201 (early) | 1956, 1957, 1958, 1959 |
| CJ series | |
| Jeep CJ-2A | 1945, 1946, 1947, 1948, 1949 |
| Jeep CJ-3A | 1949, 1950, 1951, 1952, 1953 |
| Jeep CJ-3B | 1953, 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968 |
| Jeep CJ-5 | 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983 |
📐 Diagrams & technical drawings
From the original Technical Manual CJ2A_PL_1949 — Parts List — only for Willys CJ-2A / CJ-3A (1949)
From the original Technical Manual TM 10-1513 — Maintenance Manual — only for Willys MB / Ford GPW (1942)
