You can measure the coil resistance, but it is not trivial.
- Coil resistance (from blue-black wire to tthe thin wire coming out of the pump, connected to top of braker-points_: ~ 1.6 Ohm
This is very low for most cheap multimeaters. to measure this:
* Put Multimeter in OPhm, lowest rabge (usually 200Ohm range)
* sort-circuit the meter cables by pressing them together and see what the meter says.
* If it is more then 1 Ohm: Forget it... get another meter/change battery etc.
* If the meter says < 1 Ohm: Rember the numer (say 0.6 Ohm).
* now measure the coil of the pump: say you get 2.1 Ohm.
* substract the 'short-circuit value' and you have a 'reasonable' number
Measure from the blue-balck wire to the metal-outside of the put. This should me 'open'
Don't try to measure 'through' the contact breakers: that will only give you confusing data.
- Kill-swicth OFF
- make sure the contact breakers are in contact (if they are very bad: Clean them with a small file/sandpaper)
- Pump connected to the bike
- fuelpump-switch OK (and correct value)
- Ignition key ON
--> Now switch KILL-switch ON, and the pump rod should move 'outwards' at least 1x.
The ECU (computer) of the bike only keeps the pump active for 5 seconds.
To redo this test: killswicth OFF , and wait till the pump-rod is all the way back and the contact breakers are IN contact again.
IF the pump-rod does NOT move: through pump away
Do not use WD40: the pump has dry-brass bearings, they do not get better from lubrication.