1996 Triumph Adventurer won't start.. Please help troubleshoot. - Triumph Forum: Triumph Rat Motorcycle Forums
Hinckley Classic Triples 885cc Classic Styled T3's: Legend, Thunderbird, Thunderbird Sport & Adventurer.

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post #1 of 11 (permalink) Old 08-17-2019, 07:52 PM Thread Starter
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1996 Triumph Adventurer won't start.. Please help troubleshoot.

Arrightee mate,

So I have the following problem with my 1996 Adventurer. It won't start and after sitting for a couple months I thought it was the battery and it wasn't charging properly. It was running before it sat. So something changed during the resting period. I did the following changes with in the last 6 months. I had to buy a used alternator. I installed it on the bike and it ran for the last 6 months and was charging no problem. So today I put in a new fully charged battery with 12.53 volts. I noticed right away with a volt meter, the bike turns on dash lights up and when I hit the start button the battery volts drop down to 3 volt and the bike turns off and is completely dead. A few seconds later the battery bounces back to 12 volts and the comes back on. Lights are dim and really none of turn signals really work except for turn on the button. Horn doesn't make a sound, turn signals don't blink, and headlights don't really turn either. Only when the key is turn to the start button the oil lights is and looks ready to start. Of course the bike seems to have some sort of grounding issue. I can't figure out why or how this is happening. Please help me to find this starting issue. Is this a common problem with the Hinckley electrical system? I couldn't find any thing about this problem.

Thanks,

Kap-
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1977 BMW R100RS,1995 BMW R1100GS, 1975 Honda CB750F SS, 1974 Honda CB550, 1973 Honda CB500, 1996 Triumph Adventurer

Last edited by kaptainkid1; 08-17-2019 at 08:26 PM.
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post #2 of 11 (permalink) Old 08-18-2019, 07:51 AM
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My 98 tbird had an intermittant starting problem about a year back. Sometimes lights and all would come on and work but no start. A day later it would start and run then the next time no lights no nuthin. After breaking down roadside I found out the ground strap had partially torn apart at the crimp on the battery end. It wasnt visible until I pulled on it. Perhaps a secondary ground strap could eliminate this possibility.
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post #3 of 11 (permalink) Old 08-18-2019, 08:51 AM
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when you replaced alternator did you secure the ground strap properly to alternator bolt? could starter be seized?? if battery comes back up to 12v and holds it could you bump start the bike then see if its charging or draining while running, or pull starter and check that is working then work back thru the wiring to see where it is shorting,
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post #4 of 11 (permalink) Old 08-18-2019, 11:35 AM
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1. Have the battery re-tested under load at a local auto parts store - they'll test it for free.

Replace the battery if there's ANY doubt.

2. Once the battery is tested OK, check the integrity of the ground strap from the -ve battery terminal to the frame.

If there's a high resistance in the ground circuit, either clean the connectors and re-test or replace the ground cable.

3. Check the integrity of the +ve battery terminal cable between the battery and the fuse board on the right side of the bike (behind the right side panel).

4. If the battery is definitely OK AND BOTH cables from the battery terminals are OK, remove the headlamp and check the multi-plug connectors within the headlamp bucket.

These are the connectors which join the handlebar switches to the main harness. If they shake loose you may get an intermittent voltage result, as you describe.

Please report back....

Rob
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Last edited by Anvilrob; 08-18-2019 at 11:41 AM.
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post #5 of 11 (permalink) Old 08-18-2019, 07:52 PM
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I had a similar problem. I cleaned every connection between + and the starter also - and the frame. Some are difficult to get to but if you remove the gas tank and horn you should be able to access everything.
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post #6 of 11 (permalink) Old 08-18-2019, 09:00 PM
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Electrical problems are very difficult to diagnose over the internet, especially if the description of the problem is not clear.

For starters, where exactly did you have the probes of the volt meter when you determined the battery had dropped to 3 volts?
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post #7 of 11 (permalink) Old 08-19-2019, 12:45 AM Thread Starter
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Right on the battery. I will go over the connectors and check all the ground wires. Honestly it seem the battery appears to be shorting out as if you we're to touch the positive terminal directly to negative terminal. I will start by going back to the alternator set up and double check all the connectors.

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post #8 of 11 (permalink) Old 08-19-2019, 08:45 AM
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Quote:
Originally Posted by kaptainkid1 View Post
Right on the battery.
Are the posts loose in the battery itself? If your probes were right on the battery (not the screws or the cable ends) then something is seriously wrong. Otherwise, it could be loose or corroded connections. If not, take it out, charge it, and have it load tested. Anything external that could pull a good battery down to 3 volts would produce smoke...
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post #9 of 11 (permalink) Old 08-21-2019, 01:45 AM
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When in doubt, see how it starts when jumped to another battery. Then you'll know if you have a tired battery. These bikes need a healthy battery. Hope there doesn't turn out to be a phantom weird short in there somehow. That'll ruin a battery
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post #10 of 11 (permalink) Old 08-22-2019, 08:30 AM
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Did you follow Anvilrob post on troubleshooting steps is process is well worth following. Just like was mentioned if your battery drop to 3 v when trying to start you would see something burning or you have a bad battery. Take the battery and get it load tested before going any further you stated the bike worked fine prior. Also before starting did all your lights light up no dimming and did you have your VOM connected on the battery when testing it is must in order to see what your battery is doing at the moment when you turn the lights. If battery fully charged there would be a minimal voltage drop at the battery. The other question is the battery you installed the correct size cranking amps if it is under sized it would drop when heavy load is applied. As others mentioned bad ground would cause similar issues but not a voltage drop down to 3 volts. Keep us posted would like to know the fix.
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