Twice now in the last week, my 1994 Accord has started to emit a clicking sound, like a relay clicking, from under the right side of the dash. It will click about every 3-5 seconds, and periodically, the speedometer will drop to 0 then go back to whatever speed I'm at, also, some (not all) of the dash lights will blink, all in less than a second. The clicking will continue until I shut the car off and restart it. It doesn't do it all the time, and doesn't start as soon as the car starts, and the 2 times it's started doing this, one was pulling into a parking place and the other was travelling down the road. The car runs fine for having 270k miles, except for one of the front bearings is needing to be replaced.

On a side note, when the car starts, there is a humming sound for about 30 seconds, then that stops and the ABS light comes on, but it's done that for about 2 years.

 

I know this sounds strange, check/clean/tighten the ground cables.

Get the abs codes, prob a pump over run code but get them to be sure and we can go from there. There is a "how to" in the Common DIY Threads at the top of this section, once you have them post the codes.