no power to points


Information and questions on GL1000 Goldwings (1975-1979)
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anthony1978
Posts: 6
Joined: Mon Jul 24, 2017 6:41 pm
Location: British Columbia
Motorcycle: 1978 GL1000 Goldwing

no power to points

Post by anthony1978 »



Hi I have just purchased a 1978 gl1000.She has no spark.There seems to be no power to points.How do you check condensors and coils for operation


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ekvh
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Joined: Thu Apr 29, 2010 9:52 am
Location: Grand Forks, ND
Motorcycle: 1977 gl1000

Re: no power to points

Post by ekvh »

Kill/Run switch set to run? Check fuses first?. Use a dgm and check for continuity. Old fuses can look okay but be corroded internally.
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Maz
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Location: Kent, UK
Motorcycle: 1975 GL1000K1
1976 CB500T
1979 CB750L
1990 Yamaha FJ1200
1993 Suzuki GS500E

Re: no power to points

Post by Maz »

anthony1978 wrote: Mon Jul 24, 2017 6:47 pm Hi I have just purchased a 1978 gl1000.She has no spark.There seems to be no power to points.How do you check condensors and coils for operation
Use a digital voltmeter (dvm) to check for 12v on the Black wire that feeds the coils, with ignition on and kill switch to run.
The points actually ground the coils, so you will only measure volts on the moving arm of the points WHEN THE POINTS ARE OPEN.

Maz
Ironically, Common Sense is the LEAST common of all senses!
anthony1978
Posts: 6
Joined: Mon Jul 24, 2017 6:41 pm
Location: British Columbia
Motorcycle: 1978 GL1000 Goldwing

Re: no power to points

Post by anthony1978 »

Hi have happily sparking points now but nothing to the plugs.Ran a resistance check on the coils.1 & 2 leads were running at about 16250 ohms with out boots 3 & 4 checked in at 15350 ohms.I believe they should be around 14250.Are these coils cooked.The plug ends on the wires were almost bang on at 5000 ohms for resistance.
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Maz
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Location: Kent, UK
Motorcycle: 1975 GL1000K1
1976 CB500T
1979 CB750L
1990 Yamaha FJ1200
1993 Suzuki GS500E

Re: no power to points

Post by Maz »

anthony1978 wrote: Wed Aug 02, 2017 11:41 pm Hi have happily sparking points now but nothing to the plugs.Ran a resistance check on the coils.1 & 2 leads were running at about 16250 ohms with out boots 3 & 4 checked in at 15350 ohms.I believe they should be around 14250.Are these coils cooked.The plug ends on the wires were almost bang on at 5000 ohms for resistance.
Have you checked for the 12v feed to the coils (Black or Black/White wire)? You should have 12v on this wire at each coil when the ignition is on (and when points are open - You will read less than 12v when points are closed as the coil will then be in circuit).
Check the resistance of each coil across the small power terminals (between Black and Blue on one and Black and Yellow on the other) with the coils disconnected. Should be 3ohms.
Maz
Ironically, Common Sense is the LEAST common of all senses!
anthony1978
Posts: 6
Joined: Mon Jul 24, 2017 6:41 pm
Location: British Columbia
Motorcycle: 1978 GL1000 Goldwing

Re: no power to points

Post by anthony1978 »

Hi there finally had spark enough for ignition.The bike now seems to be starving for fuel.Petcock,fuel filter and lines all seem to be clear.I have gas to the fuel pump and to the carbs but still will not pick up its fuel.Does the air breather assembly need to be installed when I am trying these tests.
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Fred Camper
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Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: no power to points

Post by Fred Camper »

Nope, she needs full choke to start, so be sure you have the choke set. Other than that, I would try an external fuel source. Hard to be sure if there is an obstruction between the fuel in the tank and the fuel in the carbs. You can also try with the tank full, to open the bowl bleed screws on each carb and make sure they keep flowing more than the bowl holds.
anthony1978
Posts: 6
Joined: Mon Jul 24, 2017 6:41 pm
Location: British Columbia
Motorcycle: 1978 GL1000 Goldwing

Re: no power to points

Post by anthony1978 »

I'm going to pressure test the fuel pump.I have disconnected the line from pump to carb with not a lot of fuel coming from carbs.Everything seems to be clear from tank to fuel pump but I will check that again.I have read here the more gas in the tank the better.Fuel caps can cause trouble to.

?
?

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Fred Camper
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Location: Metro Detroit, MI
Motorcycle: 1977 GL1000, 1976 LTD GL1000

Re: no power to points

Post by Fred Camper »

fuel cap only rears it head when going down the road, typically you can pull enough with a bad cap at idle. If in doubt, pull the cap and listen for an air rush into the tank. If you get the rush, then the cap is bad. Else, look elsewhere.
anthony1978
Posts: 6
Joined: Mon Jul 24, 2017 6:41 pm
Location: British Columbia
Motorcycle: 1978 GL1000 Goldwing

Re: no power to points

Post by anthony1978 »

A quick question.What would cause a complete blockage of fuel from getting into carb.Pulled the feed line off the carb and cannot even blow air into the carb.
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Maz
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Motorcycle: 1975 GL1000K1
1976 CB500T
1979 CB750L
1990 Yamaha FJ1200
1993 Suzuki GS500E

Re: no power to points

Post by Maz »

anthony1978 wrote: Mon Aug 28, 2017 5:38 pm A quick question.What would cause a complete blockage of fuel from getting into carb.Pulled the feed line off the carb and cannot even blow air into the carb.

If the carbs are full of fuel, the float valves will be shut. You won't be able to blow past them.
Maz
Ironically, Common Sense is the LEAST common of all senses!
anthony1978
Posts: 6
Joined: Mon Jul 24, 2017 6:41 pm
Location: British Columbia
Motorcycle: 1978 GL1000 Goldwing

Re: no power to points

Post by anthony1978 »

Seems to be fuel in carbs but will not pick it up.


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