There are many possible deficiencies. The contacts in the ignition switch arc and deteriorate a little with every use. Connectors slowly corrode and their crimped attachment to the wires becomes weaker. The solenoid gets gummed up and doesn't move as easily. The electrical resistance of the solenoid is greater when it is hot, so the starter may refuse to operate only after an hour or more of high speed driving in hot weather. Since the ground path for the solenoid is thru the starter circuit, if the brushes and commutator are bad enough, the solenoid does not operate. All these factors can contribute to varying degrees. Different list members have had success correcting different parts of the problem and so feel that their solution is the right one. Personally, I have had this problem on one bus and three vanagons. In three cases the relay solved the problem for the duration of my ownership; in the fourth case, the starter eventually had to be rebuilt. I feel that the circuit should have used a relay in the first place as the ignition switch should not have to handle that much current, very similar to the situation with the headlight switch. Larry A.
John Bange wrote: >On 3/30/06, Larry Alofs <lalofs@rcn.com> wrote: > > >>This is a very common symptom. Usually caused by the ignition switch >>circuit not supplying enough current to activate the solenoid. >> The starter itself is usually OK. A *hard start relay kit* often >>solves the problem. >> >> > > >Is it not a better idea to address whatever deficiency is in the starting >circuit? Is the circuit so marginally designed that what should be an >inconsequential loss of conductivity is enough to keep the starter solenoid >from tripping? I understand the loaf and splittie buses (6v in particular!) >had issues with this, particularly with the battery being all the way in the >back, effectively making the ignition circuit nearly twice the length of the >vehicle; but was the Vanagon still the same way? > >-- >John Bange >'90 Vanagon - "Geldsauger" > > > |
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