Symptom:
HB5 bulb cannot be installed in headlight assembly. Headlight assembly substitution. Switching from HB1 bulb to HB5 type bulb.
Part #s Affected:
- 47126159, SBA385102090, 87300250: Left-hand headlamp – replaced by 47472022
- 47126158, SBA385102100, 87300249: Right-hand headlamp – replaced by 47472033
Resolution:
The original cat eye headlight assemblies (right hand assembly part number 87300249 and left hand assembly part number 87300250) used a HI-Low beam HB1 (9004) type bulb (part number 87302899). Starting with tractor serial number ZMB11018 the road light bulb changed to a HB5 (9007) type bulb (part number 84602674). Due to the difference between the light pattern, the pin location for locating the bulb in the headlight housing and the ground and low beam wire in the connector the HB1 and HB5 the bulbs are not interchangeable. Revised headlamp assemblies (right hand assembly part number 47472033 and left hand assembly part number 47472022), were
introduced along with the latest wire harness (part number 47473581) which replaces the HB1 harness (part number
87300249) to accommodate the change to HB5 lighting. The Headlight assemblies for a HB1 bulb can be replaced by a
headlight assembly for a HB5 bulb. The headlight assembly is a direct fit in the hood. However modification to connector to the HI / Low bulb is required. Modification is necessary because pin out is different between HB1 bulb and HB5 bulb.
For the HB1 Bulb:
- Pin A Ground
- Pin B Low Beam
- Pin C High Beam
HB5 Bulb:
- Pin A Low Beam
- Pin B Ground
- Pin C High Beam
See below for instructions of rework of headlight connector.
A. Remove terminal lock.
B. Remove terminal wires from Pin A and Pin B.
– Install blue wire from Pin B into pin A. Install black wire form
– Pin A into Pin B.
– Install terminal lock.
