I have a problem with my 86 240. For starters, it seems as though i have no heater or ac ( dont really care about ac) However, when I crank on the fan speed selector, it doesn't seem to go on. I am guessing that the blower motor went. Any ideas?


In addition, I installed a tachometer in place of the huge clock in the dash. I was stupid and in a rush, so i did not disconnect the battery. Well, long and behold something went zap when I was installing it now I have no lights in the dash or console. Anyone have any ideas?


This is my first time on here so I look forward to meeting great new people with a lot of cool volvo's!!!

suspect fuse problems for both items - one blown, one dirty

are we talking fuse box? cause i checked the fuses and they are ok? any other ideas?????

is there anybody out there that knows??????????/

your ignition switch could cause the blower to stop. One of the contacts on the switch controls the blower motor. As far as the inst. lights, I'll have to look at a wiring diagram and get back to you.

thank you. The ignition switch controls the blower... wow i didnt know that. how would i know if it is this or the actual blower motor that went?

from what I can tell from the wiring diagram with the ignition on you should have power at fuse #16 with headlight switch on. If you don't it looks like the ignition switch. This is for your lighting.there should be a green?{different on some models} wire coming off your lighting dimmer switch, this should be the one that goes back to that fuse, trace it if you can to be sure. also be sure that you just didn't blow the bulbs, it is possible. As for the blower, check for power at the back of the blower switch. getting to the blower motor itself is a big job, hopefully thats not the problem. If no power there most likely ignition switch.

so in a way both problems trace to the ignition switch
1) i will check the fuses
2) I will check the bulbs (maybe they all blew out)
3) examine the green wire that goes to the fuse box from the dimmer switch
4) check the power in back of the blower switch

for number 4), how would i go about doing this????

Getting back to your first message. Although it's recommended to disconnect the battery, you can install a tachometer without disconnecting it. The most common error is when the red/white ignition wire is accidentally connected to a terminal on the cluster not to the tachometer '1' terminal. This will fry the circuit board on the cluster. The easiest solution is to get a circuit board from another 1986-87 instrument cluster.
When you mean lights do you mean all lights, including warning lights?
If you connected the red/white wire correctly then you should check the wiring harness in the engine bay. The alternator (red) and oil pressure light (black) go through a gray connector on the firewall, these are notorious for failure of the wire insulation, and shorts here can cause these warning lights to fail. These wires can be bypassed, routing new wires to the alternator and oil pressure sender.
Does the tacho, speedo, water temp and fuel gauges still work?

the warning lights all work well. The guages all work too. There was a harness by the firewall that had bad insulation and exposed wires and that was all fixed. All thie lights, (to see) instrument cluster and console, dont work. the blew out when I was trying to put in the tachometer in the dash. All the lights to see the instrument cluster and console blew out, so I dunno if its the cluster that needs replacing

The only gauges I have is the speedo, tach, gas and temp gauge on the cluster and the small clock and voltmeter on the side, the all work, with exception to the clock which works when its not cold

Well, this could be less serious since everything else works. It's unlikely that all the lights would blow simultaneously, although it is possible. It sounds like there is a break or a short in the lighting circuit somewhere. If you have a meter, check if you have voltage across the terminals on the rheostat that controls the dash lights. Also check if any of the wires have been disconnected from the circuit. By the way, do the lights on the 52 mm clock and Voltmeter work? How is the light on the Voltmeter wired? Sometimes the Voltmeter light is spliced into one of the brown lighting wires with a Scotch-lock which is not ideal. I ran a wire for my Voltmeter light directly from the rheostat.
Hope this helps.

no none of the lights on the cluster small clock, voltmeter work, although the gauges do. I also have no lights in the console (where the fan, heat, cold, ac and such are)

I got a circuit board off of another 240 volvo, but according to the speedo, the number doesnt say k9800, instead it says r0980 or something like that.

Does it matter, Im going to change out the circuit board

As for the blower motor, what do I do with the ignition switch?