The upper sealed beams are dual filament 40W/60W lamps. The lowers are single filament - 50W.
This is what is supposed to happen for each dimmer switch position:
You must be registered for see images attach
You must be registered for see images attach
Like HKJ says, the 40W filament in the upper lamp is on the same circuit (11 LT GRN) as the lower lamp (single filament 50W). There is a splice point in the harness loom directly behind the two lamp assemblies. From the splice, a short jumper (maybe a foot long) is led to each lamp connector.
So, when high beams are selected, if your lower sealed beam illuminates but the 40W filament in the upper one does not - it would suggest that:
1. The harness connector is not making contact on the HB terminal of the upper lamp. That terminal is in the lower RH corner - about 5 o'clock. I'd check that first:
You must be registered for see images attach
2. The new bulb is bad. Switch it to the RH side and compare results.
3. There is a break in the wiring either at the splice or in the short length of wire from the splice to the connector.
One thing: You definitely have the correct sealed beam installed - right? The correct one is a 2A1 type sealed beam. Easily identified by the angled geometry of the terminals. Not to be confused with the 2C/D type which have the terminals arranged in a straight T.
