Jump to content

Welcome to TheMalibuCrew!

As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. It's free and it's easy, so don't hesitate to join the TheMalibuCrew Family today!

1999 Sportster LX - intermitent Electrical shutdown

Recommended Posts

New to Forum and hoping to get some insight into a problem I have been having with my 1999 Sporster LX. Periodically, and it seems to have no pattern, the entire electical systems shuts down. The engine will die, blowers will not work, nothing at all... Then out of nowhere it seems some come back to life as if nothing has happened. The first time I took it too the shop they said they did the 'jiggle' test on the wiring under the dash and in and around the breaker panel but could not recreate it. So today it failed and required a tow for about 2 hours to get to my trailer...

Appreciate any thoughts ...


Link to comment

Start from power source ( battery ) and work your way back to dash. Remove the battery leads, clean with wire brush ( both battery terminal and wire lug ) and refit nice & tight. Do same on earth wire from battery to engine body. Maybe you have an isolator switch??? do the same with any connections on it. Check all engine multi-plug connectors. Undo them and check for corrosion or bad pins ( moisture or salt water can corrode the pins even if the plugs are meant to be waterproof ). Get into every nook and make sure you dont miss one.

Does it have a fuse box or circuit breakers. Open up the breaker/fuse box and check the connections. Fuse holders can corrode and poor electrical connection can cause open circuits.

Do same for wires and connections under dash.

If you have a multimeter then test the power wires from one item to the next for continuity eg battery to isolstor, isolator to fuse box, fuse box to ignition key switch, switch to dash, etc

Check your earths. Just because you have power going to equipment doesn't mean that its ok. I spent 3 hours Saturday midnight on a container ship tracing a bad earth in a 12v circuit.

The jiggle test can work but you must do it on each individual wire. Intermittent faults like these are a huge PITA. You may have to run the engine during some of your troubleshooting to help re-create the fault ( engine creates vibrations ).

Good luck.

Edited by Ozfabs
Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...