Tach reading low
Not sure where the problem lies. 2002 Itasca Horison, Cummins 300 HP 5.9 ISB, Allison 6 speed transd, Freightliner chassis Normally at 60 MPH the tach reads about 1700-1800 rpm. Noticed yeste...
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Canadian Rainbirds wrote:
Next day tach performed normally and has been doing so to date, 5 days of driving, about 1,000 kilometers. Must have been a gremlin.
Though the cruise control had been much more intermittent than usual.
Regarding the cruise control, look for corrosion on the brake wire terminals on the two brake light switches, located on bottom of brake treadle. You have to access them from under the coach. Several Freightliner owners have posted this has caused cruise control problems.
If you're lucky, the tach will continue to work normally.
Fred
