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Author Topic: Oil Pressure light is now my Neutral Indicator!  (Read 1109 times)

Breezerider

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Oil Pressure light is now my Neutral Indicator!
« on: October 09, 2009, 11:04:02 AM »
My Neutral light no longer comes on, instead, when I start the motor, the Oil Pressure Light stays on until I put it in first gear.  It now seems to be acting as the neutral indicator light.  I inspected the connections behind the light panel, cleaned and reinstalled them...same problem.  Any Ideas?


Offline Bob_Roller

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Re: Oil Pressure light is now my Neutral Indicator!
« Reply #1 on: October 09, 2009, 11:37:41 AM »
I would check the wiring connections at the wiring harness on the left side of the bike, around the foot peg area, both the low oil pressure switch, and the neutral light switch wiring are in the same harness, sounds like some wires got misconnected .
'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Yikes

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Re: Oil Pressure light is now my Neutral Indicator!
« Reply #2 on: October 09, 2009, 11:44:01 AM »
I had a similar problem on my '82 that involved the neutral indicator light that turned out to be a failing diode contained in the starter relay.  Replacing the diode fixed the problem, but i ended up having to replace the whole relay a few weeks later.  Perhaps the starter relay could also have something to do with your other starter problem.

Offline Bob_Roller

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Re: Oil Pressure light is now my Neutral Indicator!
« Reply #3 on: October 09, 2009, 11:49:07 AM »
The diode in the starter relay, if it fails, will cause the neutral light to illuminate when the clutch lever is pulled in, no matter what gear you are in .
'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Yikes

  • Guest
Re: Oil Pressure light is now my Neutral Indicator!
« Reply #4 on: October 09, 2009, 03:51:50 PM »
Quote
The diode in the starter relay, if it fails, will cause the neutral light to illuminate when the clutch lever is pulled in, no matter what gear you are in .
Bob's got it.  That's exactly what was happening with my '82.  

John M

Offline Justin B.

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Re: Oil Pressure light is now my Neutral Indicator!
« Reply #5 on: October 12, 2009, 03:45:46 PM »
This almost sounds like a bad ground, maybe in the tachometer.  When a ground opens up in an instrument panel (cars anyway) all kinds of strange things happen as circuits try grounding through other bulbs, etc...
Justin B.

2004 BMW R1150RT
1981 R100RT - Summer bike, NEKKID!!!

Breezerider

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Re: Oil Pressure light is now my Neutral Indicator!
« Reply #6 on: October 13, 2009, 12:26:28 AM »
Quote
I would check the wiring connections at the wiring harness on the left side of the bike, around the foot peg area, both the low oil pressure switch, and the neutral light switch wiring are in the same harness, sounds like some wires got misconnected .

I don't think so.  It was working fine, then went through a period where it would switch lights, sometimes working normally, sometimes not.  I didn't touch anything on the bike when it started, no wires could have got misconnected.

Breezerider

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Re: Oil Pressure light is now my Neutral Indicator!
« Reply #7 on: October 13, 2009, 12:30:14 AM »
Quote
I had a similar problem on my '82 that involved the neutral indicator light that turned out to be a failing diode contained in the starter relay.  Replacing the diode fixed the problem, but i ended up having to replace the whole relay a few weeks later.  Perhaps the starter relay could also have something to do with your other starter problem.

Hmm, yes the two problems might be related.  I'll start looking for a new starter relay.  Thanks guys.